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Archive 2013 · A7/A7r - performance with WA RF lenses

  
 
ebrandon
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p.35 #1 · A7/A7r - performance with WA RF lenses


Taylor Sherman wrote:
I think 35 is the better wide FL for initial launch. It's what many people will want for snapshots, and it's nice and small. A 24 probably would have been bigger.

Also, there's the ZA24/2 with the LA-EA4 adapter for those that want a really sharp and super-fast-AF wide angle. Of course, that combo is pushing $2k.



Don't forget the Minolta Alpha mount 24mm f2.8, which is tiny and very high quality! Love mine, and can't wait to try it on the A7R.



Oct 23, 2013 at 05:45 PM
sebboh
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p.35 #2 · A7/A7r - performance with WA RF lenses


carstenw wrote:
Hmm, I am okay with 16-35/4, 24-70/4, 50/1.8 and 85/1.8, but I really really wish that the 35 was an f/2 lens.


yeah, i'd be super excited if they magically figured out how to put the rx1 lens in this mount. as it is, i think i will probably just stick to the rx1 for 35mm (even with the camera on the back it's smaller than my other favorite 35mm lens). the lux pre-asph does tempt me as a counterpoint to the rx1 though... will have to see how it performs on the a7r.




Oct 23, 2013 at 05:47 PM
douglasf13
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p.35 #3 · A7/A7r - performance with WA RF lenses


Taylor Sherman wrote:
I think 35 is the better wide FL for initial launch. It's what many people will want for snapshots, and it's nice and small. A 24 probably would have been bigger.

Also, there's the ZA24/2 with the LA-EA4 adapter for those that want a really sharp and super-fast-AF wide angle. Of course, that combo is pushing $2k.



Of course, the 35 is necessary for initial launch. I'm saying there should have been something like a 24'ish, 35, 55 and 85 ALL available soon. That would be enough to bring in Leica users who aren't rangefinder loyalists, as well as prime users from other systems. If anything, focusing less on zooms would have made more sense to me, if that meant a simple, 4 prime lineup would have been developed sooner. Adapting zooms with the LA-EA4 isn't a big deal, because zooms are already relatively large, anyways.



Oct 23, 2013 at 06:17 PM
uhoh7
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p.35 #4 · A7/A7r - performance with WA RF lenses


ebrandon wrote:
Don't forget the Minolta Alpha mount 24mm f2.8, which is tiny and very high quality! Love mine, and can't wait to try it on the A7R.


or the sony alpha 35/1.8 which is dirt cheap and no slouch. It's also light and small. (except for that pesky LAEA4)

http://farm6.staticflickr.com/5245/5370451811_79ef602c20_b.jpg

$218 brand spankin new. 167grams of high quality plastic!

Edited on Oct 23, 2013 at 06:36 PM · View previous versions



Oct 23, 2013 at 06:28 PM
redisburning
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p.35 #5 · A7/A7r - performance with WA RF lenses


douglasf13 wrote:
That would be enough to bring in Leica users who aren't rangefinder loyalists, as well as prime users from other systems.


what percentage of the greater Leica population do you suppose that is, though?

one does not simply buy Leica because it's on display in the shop. Ive been to shops with camera gear and even when I was specifically looking to purchase Leica stuff I've never been told it gives better results by a sales person. You buy Leica because you like rangefinders a lot. Because if you don't, the prices are just flat out silly. Best or not, a 2000 USD kit 50mm aint no joke.



Oct 23, 2013 at 06:35 PM
sebboh
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p.35 #6 · A7/A7r - performance with WA RF lenses


uhoh7 wrote:
or the sony alpha 35/1.8 which is dirt cheap and no slouch. It's also light and small. (except for that pesky LAEA4)


that lens is aps-c only. the minolta a-mount 35/2 is the same size, better built and very nice though. sadly it's ridiculously overpriced on the used market.




Oct 23, 2013 at 06:36 PM
uhoh7
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p.35 #7 · A7/A7r - performance with WA RF lenses


sebboh wrote:
that lens is aps-c only. the minolta a-mount 35/2 is the same size, better built and very nice though. sadly it's ridiculously overpriced on the used market.



ouch!!! now you tell me!

tell you what, though, exit pupil diameter bigger than PC-nikkor 35/2.8

could be a sleeper.



Oct 23, 2013 at 06:37 PM
douglasf13
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p.35 #8 · A7/A7r - performance with WA RF lenses


uhoh7 wrote:
ouch!!! now you tell me!

tell you what, though, exit pupil diameter bigger than PC-nikkor 35/2.8

could be a sleeper.


Where are you finding exit pupil diameter measurements? Is there a reference out there? Thanks!



Oct 23, 2013 at 06:54 PM
Tariq Gibran
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p.35 #9 · A7/A7r - performance with WA RF lenses


sebboh wrote:
that lens is aps-c only. the minolta a-mount 35/2 is the same size, better built and very nice though. sadly it's ridiculously overpriced on the used market.



There is also the Minolta 28/2, which I found slightly better than the Minolta 35/2. Both are very nice lenses, though I suspect a 36MP sensor would turn them into slightly better than average lenses (showing off the 35's weak borders and the 28's CA). I would buy the FE 35 2.8 over both any day.



Oct 23, 2013 at 07:12 PM
douglasf13
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p.35 #10 · A7/A7r - performance with WA RF lenses


Tariq Gibran wrote:
There is also the Minolta 28/2, which I found slightly better than the Minolta 35/2. Both are very nice lenses, though I suspect a 36MP sensor would turn them into slightly better than average lenses (showing off the 35's weak borders and the 28's CA). I would buy the FE 35 2.8 over both any day.


Yeah, that's kind of what I'm getting at. At least one solid, modern performing wide angle should be a must for the system at launch. I consider 35 to be more wide-standard.



Oct 23, 2013 at 07:17 PM
uhoh7
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p.35 #11 · A7/A7r - performance with WA RF lenses


douglasf13 wrote:
Where are you finding exit pupil diameter measurements? Is there a reference out there? Thanks!


I am looking at the rear element of the lens. I've got 60 or so lying around.

Once the dust settles in the spring and I see what really is good, maybe I will sell a bunch and get an M9 as a third digi body, since they are now down to 3500 for nice ones.

Edited on Oct 23, 2013 at 07:27 PM · View previous versions



Oct 23, 2013 at 07:25 PM
Tariq Gibran
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p.35 #12 · A7/A7r - performance with WA RF lenses


douglasf13 wrote:
Yeah, that's kind of what I'm getting at. At least one solid, modern performing wide angle should be a must for the system at launch. I consider 35 to be more wide-standard.


I can see that. Considering that the RX1 exists, I'm a little surprised Sony did not either release a 24 with the FE 35 2.8 OR just split the difference and release one 28 2.8 instead of the 35. Instead, I suspect Sony took the quickest way possible in releasing the 35 2.8 (since they had the RX1 they could sort of base it off of).



Oct 23, 2013 at 07:27 PM
douglasf13
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p.35 #13 · A7/A7r - performance with WA RF lenses


uhoh7 wrote:
I am looking at the rear element of the lens. I've got 60 or so lying around.

Once the dust settles in the spring and I see what really is good, maybe I will sell a bunch and get an M9 as a third digi body, since they are now down to 3500 for nice ones.


Are you looking at the rear element of the lens, or are you looking at the size of the aperture opening through the rear of the lens? The former is the size of the rear element, the latter is the size of the exit pupil.



Oct 23, 2013 at 07:31 PM
uhoh7
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p.35 #14 · A7/A7r - performance with WA RF lenses


douglasf13 wrote:
Are you looking at the rear element of the lens, or are you looking at the size of the aperture opening through the rear of the lens? The former is the size of the rear element, the latter is the size of the exit pupil.


good point, I should make one of these simple testers, you know with cardboard and light.

How do I do that?



Oct 23, 2013 at 08:21 PM
RustyBug
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p.35 #15 · A7/A7r - performance with WA RF lenses


douglasf13 wrote:
The former is the size of the rear element, the latter is the size of the exit pupil.


Would that be "apparent size" of the exit pupil as it appears through the rear element vs. actual physical size of exit pupil?



Oct 23, 2013 at 08:24 PM
douglasf13
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p.35 #16 · A7/A7r - performance with WA RF lenses


The exit pupil is only a virtual image. To quote wiki: "In optics, the exit pupil is a virtual aperture in an optical system. Only rays which pass through this virtual aperture can exit the system. The exit pupil is the image of the aperture stop in the optics that follow it."

Edited on Oct 23, 2013 at 08:35 PM · View previous versions



Oct 23, 2013 at 08:33 PM
RustyBug
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p.35 #17 · A7/A7r - performance with WA RF lenses


Okay, thanks.


Oct 23, 2013 at 08:34 PM
uhoh7
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p.35 #18 · A7/A7r - performance with WA RF lenses


good source here
http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/stop.html

but I've seen sensor coverage testing with out a camera, again using cardboard or tissue, recently, but lost link.

Help ")



Oct 23, 2013 at 09:09 PM
philip_pj
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p.35 #19 · A7/A7r - performance with WA RF lenses


Agree with douglas - I guess it's a matter of resources and priorities but a fine 85/1.8 and 24/3.4 would have sold many more on an 'all native lenses' buy. I am sure they will listen.

Some will have the RX1 for quiet high IQ, and get other lenses. so for them the 35/2.8 is not an option. I am in that camp too. Very encouraged that the AF speed is up to scratch...a huge plus for the native lenses.



Oct 23, 2013 at 09:50 PM
glacierpete
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p.35 #20 · A7/A7r - performance with WA RF lenses


It surprizes me that the A7r is not offered as a kit with the Sony FE 28-70mm F3.5-5.6 OSS.
Now with all these reports coming in, that wide angle range finders might not perform so well, the kit lens would be a cheap first compromise for landscape photographers using it at 28mm stopped down to f8/f11 on the A7r. Weight 426 g (0.94 lb)
Combined with a Contax G45 / G90 or Leica 90 Tele Elmarit it would be a resonable portable package.



Oct 23, 2013 at 11:02 PM
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