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Archive 2013 · Official: Sony A7 and A7R Fullframe Mirrorless
  
 
Alpha_Geist
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p.194 #1 · p.194 #1 · Official: Sony A7 and A7R Fullframe Mirrorless


cengell wrote:
Hello Alpha_Geist, I would think so if they are for full frame ext tubes, I have emailed may made in China ext tubes makers and most say don't think so or not sure since all most all of them are for the NEX7 series.

I did get a email saying that the Kenko Auto Macro Extension Tube Set DG for Sony A7r are FF ones, but cost $140.00 and are made of all of metal.

I did not want to pay that much as not sure how many times I will use ext tubes.

But when I get the made in China cost
...Show more

Thank you Christopher! I didn't even know about FF and Crop compatibility for extension tubes. I learned something today.



May 10, 2014 at 05:52 AM
Alpha_Geist
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p.194 #2 · p.194 #2 · Official: Sony A7 and A7R Fullframe Mirrorless


phuviano wrote:
My metabones adapter should be in my hands by tuesday. Just waiting for it to be delivered.

I have kenko extension tubes (nikon, AF version). AF is pretty much useless on them. The working distance, or range i should say, is very small. I used a nikon 85 1.8g in the past with these tubes on a nikon d600. I'm not sure how it will perform on my A7, but we'll see.

What do you mean if it'll work or not? Do you mean AF? Metering? Exif info?do you mean if it'll cover the full frame sensor?

If some else doesnt respond first.
...Show more

I should have been a bit clearer with my "will it work." :P Since my 50 Macro Planar is the canon version, I'm unable to manually control the aperture of the lens without some form of electrical contacts. I'm not so much worried about metering or AF (as the lens is MF only), but control of the aperture is a definite must for the ZE version of that lens. EXIF would be a nice addition though.

It would be interesting to hear your extension tube experience when your metabones adapter arrives. I hope all goes well!



May 10, 2014 at 05:56 AM
phuviano
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p.194 #3 · p.194 #3 · Official: Sony A7 and A7R Fullframe Mirrorless


I'm getting the metabones adapter that has the aperture control ring (nikon version). Do they not make a canon version of the metabones with an aperture ring on the adapter? Sorry i'm not familiar with metabones for canon.

I guess my situation is different, since my aperture will controlled by the metabones adapter, and not electronically. I guess i can't help you out.



May 10, 2014 at 06:11 AM
Samuli Vahonen
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p.194 #4 · p.194 #4 · Official: Sony A7 and A7R Fullframe Mirrorless


Alpha_Geist wrote:
I posted this on the Macro Forum, but since this is the official A7(r) thread, then it should be appropriate here as well:

Has anyone tried macro extension tubes (with the electric contacts) on the Metabones adapters? If they do work, then maybe I'll be able to use my Zeiss 50MP ZE with tubes on my Sony A7. Or am I dreaming?

Has anyone tried tubes + metabones on their A7(r)? Yay, nay?

You are sure getting answers to all possible questions but not yours

Answer: yes if you use EF-mount tubes the electronic aperture works well. I can't imagine any freaking reason why would anyone use FE-mount tubes in this situation.

I just tested MP50ZE with Kenko 36mm tube and Kenko 2x extender. Will be posting to image thread later today.

Samuli



May 10, 2014 at 06:46 AM
Alpha_Geist
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p.194 #5 · p.194 #5 · Official: Sony A7 and A7R Fullframe Mirrorless


Samuli Vahonen wrote:
You are sure getting answers to all possible questions but not yours

Answer: yes if you use EF-mount tubes the electronic aperture works well. I can't imagine any freaking reason why would anyone use FE-mount tubes in this situation.

I just tested MP50ZE with Kenko 36mm tube and Kenko 2x extender. Will be posting to image thread later today.

Samuli


YOU THE MAN Samuli!



May 10, 2014 at 07:22 AM
Lan11
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p.194 #6 · p.194 #6 · Official: Sony A7 and A7R Fullframe Mirrorless


tsdevine”
‘Is this part of a public service initiative? Will there be some kind of counseling provided?”

Sorry, no freebies from me. Need counselling? Let you fingers start walking: Yellow Pages :-)



May 10, 2014 at 02:51 PM
cengell
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p.194 #7 · p.194 #7 · Official: Sony A7 and A7R Fullframe Mirrorless


Sorry Alpha_Geist, I read it wrong, yes it will work as just like a Canon lens works, but as pointed out even the best AF system has issues with macro and with a limited DOF it very hard shooting hand holding.

On a tripod it's easier I find but rarely that happens, mostly hand holding and moving back and forth once I move the focus square where I want to focus.

If you don't have ext tubes for Canon EF is why I talked about the FE tubes at $25 so much cheaper as Canon mt by adoramma.com private label was $82.95 or so last time I looked. with a FE tubes you could use them on any Sony 35 or higher as I want to try with the Sony 55 1.8, that's why the FE tubes made sense.

Christopher



May 10, 2014 at 11:11 PM
Alpha_Geist
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p.194 #8 · p.194 #8 · Official: Sony A7 and A7R Fullframe Mirrorless


cengell wrote:
Sorry Alpha_Geist, I read it wrong, yes it will work as just like a Canon lens works, but as pointed out even the best AF system has issues with macro and with a limited DOF it very hard shooting hand holding.

On a tripod it's easier I find but rarely that happens, mostly hand holding and moving back and forth once I move the focus square where I want to focus.

If you don't have ext tubes for Canon EF is why I talked about the FE tubes at $25 so much cheaper as Canon mt by adoramma.com private label was
...Show more

No worries Christopher! I'm eager to hear about your experience with the FE tubes when you get them in.



May 12, 2014 at 07:47 AM
R.Young
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p.194 #9 · p.194 #9 · Official: Sony A7 and A7R Fullframe Mirrorless


R.Young wrote:
I've just bought an A7R and metabones adapter for all my existing ef lenses as well my rokkor and contax lenses which are leitaxed/Buchanan'd to EF mounts. I just tried fitting the contax 35 1.4 to the metabones and there seems to be a grinding issue with the EMF chip I have fitted to the leitax adapter. The connector pins of the metabones are crashing against the emf chip and have ground a pretty big groove into it. My A7R has not yet arrived to test if the chip works with the metabones or even if it is now damaged
...Show more


Just to follow up on this, both my rokkor and contax lenses behave the same on my metabones adapter as with my canon. Not sure if they are emf chips on my leitax adapted contax lenses as it was a few years ago when I bought them, but they record aperture and focal length fine. Buchanan's rokkor - ef adapter also works fine and records correct exif



May 12, 2014 at 10:42 PM
cengell
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p.194 #10 · p.194 #10 · Official: Sony A7 and A7R Fullframe Mirrorless


Just got the 2 ext tubes from ebay and work good, now these are the least costly tubes I found but they are good. I wanted some low cost tubes and looks like these will work in FF mode!

I put on my 55 1.8 Sony FF and no dark corners and it will AF, it has a 10 mm & 16 MM tubes and I used both and got good images with them.

Now I would not put much weight on them because they are plastic tubes with metal flanges and because I would not use say a 55-210 with that much weight hanging on them because of the flange screws are only going into plastic.

So I also put on the 35 mm 2.8 Sony FF on and not that it will be the lens to use it on it AF fine.

So more testing needed and for less than $27 for the set seam to be fine for a low use with a 55 or light Sony cropped lens.

Any questions just ask.

Christopher



May 12, 2014 at 11:54 PM
 

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dovey
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p.194 #11 · p.194 #11 · Official: Sony A7 and A7R Fullframe Mirrorless


Well done, thanks for that information
Do you still have aperture control over the 55 1.8 FE lens or is wide open for shooting?



May 13, 2014 at 12:41 AM
cengell
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p.194 #12 · p.194 #12 · Official: Sony A7 and A7R Fullframe Mirrorless


Yes works like if its on the camera same function.
your PM replied.

Christopher



May 13, 2014 at 01:53 AM
paah75
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p.194 #13 · p.194 #13 · Official: Sony A7 and A7R Fullframe Mirrorless


Lan11 wrote:
I'm getting back to you repeating the same question: "Is this talking reality?"
May I suggest that you look at the prints at usual size. Unless you exhibit parts of the pictures, on the monitor hanging on the wall : -) As to the print comparison, up to the 16x20 size, it’s a yawn.


If you're talking about Alpha 7R vs EOS 5D mkIII, then the Sony 36MP sensor wins hands down in IQ. Resolution is not the only benefit, but the Sony sensor has also 2 stops wider dynamic range (before downsampling). This is magnificent benefit for high contrast situations.

It is also kind of cool that I can use my TS-E 17/4 & TS-E 24 3.5 L II lenses on the A7R and get much better IQ than on any native Canon body at the moment. Unfortunately Canon is lagging in sensor tech and seems very slow at updating it (about 3 year cycles).

And then D800 vs A7R which I both own. The latter produces sharper images with the same lens and aperture thanks to lack of AA filter. Otherwise IQ is pretty much equal. So its largely question of convenience for a particular job.

Internal reflections caused by adapters can be largely minized by using optical flock paper. Its quite easy mod to do. Canon produces sensor refl



May 14, 2014 at 07:02 AM
snapsy
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p.194 #14 · p.194 #14 · Official: Sony A7 and A7R Fullframe Mirrorless


snapsy wrote:
Wonk Alert! I've done a light transmission test (t-stop) on my A7r for all the 35mm to 50mm lenses I have on hand. The purpose of the test is to see how much light is reached at the sensor when the lenses are wide-open, which accounts both for lens transmission (t-stop) as well as sensor micro-lens transmission loss (DxO Article). This information can be used to make weight/size/price decisions for those considering a purchase of these lenses and wanting the best effective light transmission (ie, best low-light performance).

The test was performed by shooting a raw image of an X-Rite Color, with each lens at the largest aperture supported and the chart centered in the frame to prevent vignetting from affecting the results. All raws were loaded into CS6 with identical white-balance. The Leica Noctilux f/0.95 was used as the reference lens since it is the fastest. The 2nd darkest gray patch on the color chart (3rd patch on top row from left) was sampled in CS6 to obtain the reference luminance. I then loaded the images from the other lenses and adjusted the ACR exposure compensation for each so that the 3rd patch matched the luminance from the Noctilux reference...the delta from reference to the f-stop shows the relative transmission of each lens.

Side note: By comparing the light transmission of the Canon 50L f/1.2 and f/1.4 lenses mounted on a generic EF adapter (no electrical contacts) vs those same lenses mounted on a Metabones Smart Adapter (w/electric contacts, so f/stop data passed to camera), I determined that the A7r does a "silent" ISO gain of .35 stops for f/1.2 and .33 stops for f/1.4. The values in the chart for EF lenses exclude those gains (ie, show the real EV difference).

How to read the chart:
* The "Expected Exp Comp" column shows the expected EV difference between each lens tested vs the Noctilux based on the nominal aperture difference. For example, f/1.2 -> f/1.0 represents 1/2 stop nominal difference. For ease of viewing I've rounded the Noctilux up to f/1.0
* The "ACR Exposure Comp Necessary" column shows how much positive exposure compensation was required to match the brightness of the Noctilux. This value is expected to be less than or equal to the nominal f/stop difference.
* The "EV Diff" shows the exposure compensation necessary vs the expected exposure comp. A positive value indicates that the amount of ACR exposure comp was less than indicated by the nominal f/stop difference. A negative value indicates that the amount of ACR exposure comp was more than indicated by the nominal f/stop difference.

If you want to see the effective transmission difference between two lenses, compare them in the "ACR Exposure Comp Necessary" column. For example, the Sony FE55 @ f/1.8 is 1.30EV darker than the Noctilux @ f/0.95.
http://horshack.smugmug.com/photos/i-Sc9xZ3B/0/O/i-Sc9xZ3B.jpg
...Show more

The above quoted post measured the light transmission of various large-aperture lenses on the A7r. This was done to measure both the amount of light loss at the sensor microlenses and the relative light transmission of the lenses tested. I've done a new light transmission test but this time testing the relative transmission of the same lens (Leica Noctilux f/0.95) on all three A7 body types. Per DxO's f/stop blues article, higher-density sensors typically exhibit more light loss at very large apertures vs lower-density sensors, as a function of the light loss at the microlenses. My new test sought to compare this loss across the bodies. Here are my results:

A7s: f/0.95 -> f/1.4 lost 0.20 EV
A7: f/0.95 -> f/1.4 lost 0.27 EV
A7r: f/0.95 -> f/1.4 lost 0.39 EV

The above results were obtained by shooting a color checker chart at both f/0.95 and f/1.4 on all three bodies, then measuring the relative EV difference on each body between those two apertures on the gray patch of the chart. The A7r loses .19 EV more light at f/0.95 vs the A7s (ie, the A7s collects 1/5 stop more light vs the A7r at f/0.95), whereas the A7 only loses .07 EV vs the A7s.



Jul 20, 2014 at 05:24 AM
leetmode
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p.194 #15 · p.194 #15 · Official: Sony A7 and A7R Fullframe Mirrorless


Has anyone found a good eye cup that works with these cameras? Too much light gets in when I try to look through the EVF making it a very frustrating experience when its bright outside.


Jul 20, 2014 at 10:53 PM
redford01
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p.194 #16 · p.194 #16 · Official: Sony A7 and A7R Fullframe Mirrorless


I don't know of any eyecup made for the camera but you can make one by stretching a Nikon DK-19 over the existing eye piece.


Jul 22, 2014 at 02:39 AM
cengell
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p.194 #17 · p.194 #17 · Official: Sony A7 and A7R Fullframe Mirrorless


Hello all, I have ordered 4 of those Nikon knockoffs for my A7r & A7 and it does work so what I wanted was a Hoodman like eyecup but as of yet have not made a real eyecup that fits the eye good to prevent light leaks in daylight....

Until now I found this on Ebay and since have ordered 5 as it nice to have backups. I got it from http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=201114542036 and it's called Rubber Eyepiece Eyecup for Canon EOS 350D 300D 5D 10D 20D 30D 60D 1D MK II regualr price is $9.99 and free shipping and now it's $5.99 and free shipping and it comes with a great micro fiber cloth that works great!!

It fits nice tight and won't just fall off and it is very soft rubber and looks good on my Sony A7 and A7r body's and at regular price for $10 buck you get a very nice quality eyecup and a great microfiber cloth and they make them 16x16 I also ordered 4 of those to wrap my Sony body's in.

Also you can fold back the eyecup so it's not always out, now the only thing is I took and Dremel tool and removed a bit from inside the black plastic part that is close to the Sony eye sensor, you can also use a file to remove a cutout so it's not blocking the Sony eye sensor. After that it works great and you should like it as I have purchased and tried many options and I like this the best and for $10 and not $5.99 free shipping in the US great deal!

Any questions just ask!

Christopher




Jul 22, 2014 at 03:23 AM
KOJI
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p.194 #18 · p.194 #18 · Official: Sony A7 and A7R Fullframe Mirrorless


leetmode wrote:
Has anyone found a good eye cup that works with these cameras? Too much light gets in when I try to look through the EVF making it a very frustrating experience when its bright outside.


1) use old Minolta eyecup (early 70's, hard to find it)
2) use newer Minolta eyecup (EH-7 out of production)
3) use Nikon DK-22 + DK-2
4) use Nikon DK-22 + FA eyepiece + DK-3
5) use Pentax eyecup M 30086
6) use Nikon DK-19 (stretch it) or DK-6 (cut the corners)



Jul 22, 2014 at 01:52 PM
leetmode
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p.194 #19 · p.194 #19 · Official: Sony A7 and A7R Fullframe Mirrorless


redford01 wrote:
I don't know of any eyecup made for the camera but you can make one by stretching a Nikon DK-19 over the existing eye piece.


---------------------------------------------

cengell wrote:
Hello all, I have ordered 4 of those Nikon knockoffs for my A7r & A7 and it does work so what I wanted was a Hoodman like eyecup but as of yet have not made a real eyecup that fits the eye good to prevent light leaks in daylight....

Until now I found this on Ebay and since have ordered 5 as it nice to have backups. I got it from http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=201114542036 and it's called Rubber Eyepiece Eyecup for Canon EOS 350D 300D 5D 10D 20D 30D 60D 1D MK II regualr price is $9.99 and free shipping and now it's
...Show more

---------------------------------------------

KOJI wrote:
1) use old Minolta eyecup (early 70's, hard to find it)
2) use newer Minolta eyecup (EH-7 out of production)
3) use Nikon DK-22 + DK-2
4) use Nikon DK-22 + FA eyepiece + DK-3
5) use Pentax eyecup M 30086
6) use Nikon DK-19 (stretch it) or DK-6 (cut the corners)


Thanks for the advice guys, I'll check them all out!



Jul 24, 2014 at 04:56 PM
Beni
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p.194 #20 · p.194 #20 · Official: Sony A7 and A7R Fullframe Mirrorless


I have the nikon eyecup, works fine but warning that if you wear glasses eye relief does suffer, the far corners go rather dark.


Jul 24, 2014 at 06:44 PM
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