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Archive 2012 · Olympus OM-D EM-5

  
 
millsart
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p.40 #1 · Olympus OM-D EM-5


you2 wrote:
Bit confused I thought both the black and silver had the exact same 'weird grip material"; are you saying there is a difference in teh grip material on the body itself ?



Yes, the black one has a kind of modern looking carbon fiber material while the silver one has a faux leather covering.


Please see included links

silver

http://1.s.img-dpreview.com/files/news/3156989980/front.jpg?v=1512

black

http://www.dpreview.com/reviews/olympusEM5/images/intro.jpg



Jun 14, 2012 at 01:20 PM
you2
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p.40 #2 · Olympus OM-D EM-5


Yea it shows clearly in amazon picture if you know what to look for; I called the guy and switched it to the silver body. He thought it would be 2 weeks so will be close to my trip but I actually don't turn cameras over very often so I think it is worth the wait.

I am a bit surprise that olympus would do something that is more than mere cosmetic between the two bodies. I did play with a black one at a trade show and I know what you are talking about; just didn't realize they changed it on the silver body. Hum. oh well.



Jun 14, 2012 at 01:33 PM
olyacme
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p.40 #3 · Olympus OM-D EM-5


bobbytan wrote:
I don't know if this question has popped up before but has anyone used one of those EOS-m43 adaptors with the built-in aperture ring? That is so damn cool ... if it works! You can buy the Kipon version on eBay for $99 or the EZ Photo version on Amazon for $52. If anyone has used one of these I would appreciate any comment or advice.


Unfortunately, to do a proper job of stopping down the aperture, the iris has to be located at a fairly precise position within the lens. Placing it well behind the lens, as this adapter seems to do, will usually introduce significant mechanical vignetting, rather than uniform reduction of aperture. ie, the edges of the frame will grow darker more rapidly than the centre of the frame does.

/Acme



Jun 14, 2012 at 05:50 PM
FlyPenFly
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p.40 #4 · Olympus OM-D EM-5


lol holy crap $400 for a battery

http://www.ebay.com/itm/Genuine-Olympus-BLN-1-Rechargeable-Lithium-Ion-Battery-1220mAH-OM-D-E-M5-B100-/110885500527?pt=Batteries_Chargers&hash=item19d14a766f



Jun 14, 2012 at 09:31 PM
bobbytan
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p.40 #5 · Olympus OM-D EM-5


Don't they know this when they invented this aperture? There are at least 3 different brands of adaptors with this built-in aperture ring. Here's one report:

http://philipbloom.net/2010/12/17/ne-adaptor-for-using-you-canon-eos-lenses-on-gh1-gh2-af101/

olyacme wrote:
Unfortunately, to do a proper job of stopping down the aperture, the iris has to be located at a fairly precise position within the lens. Placing it well behind the lens, as this adapter seems to do, will usually introduce significant mechanical vignetting, rather than uniform reduction of aperture. ie, the edges of the frame will grow darker more rapidly than the centre of the frame does.

/Acme




Jun 15, 2012 at 12:21 AM
olyacme
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p.40 #6 · Olympus OM-D EM-5


bobbytan wrote:
Don't they know this when they invented this aperture? There are at least 3 different brands of adaptors with this built-in aperture ring.


I'm sure the people who build the adaptors are well aware of the limitations, though they may or may choose not to note them well in product descriptions.

An iris positioned behind the lens like that is part way between being a field stop (which would reduce the FOV of the lens) and an aperture stop (which is what's desired here). Consider what would happen if the iris were placed directly over the sensor, where it would be a pure field stop, rather than an inch or so above it, and then consider how much further you'd have to go to reach the location of the lens's internal iris. Since the adaptor's placement is somewhere in between these two positions, the result of its action is somewhere in between.

Rather than abruptly blocking all the rays hitting the outside edges of the field, as in a field stop, instead only the rays originating from the periphery of the optical path are occluded. Likewise rays hitting the centre of the field are barely occluded at all, unlike from the action of an aperture stop. Hence vignetting results instead of uniform aperture reduction or outright obstruction.

Exact results are going to depend on the lens it's employed with. It's not a useless device, it's just not quite as billed either.

/Acme



Jun 15, 2012 at 06:08 AM
kwalsh
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p.40 #7 · Olympus OM-D EM-5


The other issue with these "behind the lens" aperture adapters is not just vignetting, but impact to all of the other aberrations. As a result resolution and CA will not improve as much when stopping down as they would using a properly placed iris.

This is from an optics book and is for a single lens element (so a gross simplification) but shows the general idea that the location of the aperture stop is fairly critical to good aberration control:

http://www.kenandchristine.com/photos/i-rVXxWGT/0/O/i-rVXxWGT.jpg

Ken



Jun 15, 2012 at 07:58 AM
millsart
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p.40 #8 · Olympus OM-D EM-5


Darn, yet more reasons we are "forced" to use all the compact and optically excellent native AF glass


Jun 15, 2012 at 08:27 AM
Edgar M
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p.40 #9 · Olympus OM-D EM-5


So...who's going to start a dedicated "Olympus OM-D E-M5 Picture Thread", with more pics and less talk? ..I think it's about time


Jun 15, 2012 at 10:44 AM
millsart
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p.40 #10 · Olympus OM-D EM-5


bobbytan wrote:
There are some really great native m43 prime lenses but you can make it twice as much fun when you use non-native FT and 35mm lenses from OM, Canon, Nikon, Pentax, Zeiss, etc ... that you already own. This is one of the great attractions of the MFT format. - you have the widest selection of any format.


I think you missed the sarcasm intended in that post first of all.

Second, I've got plenty of Nikon AI and AIs lens, my OM system glass still, some Canon and Pentax lens etc and a number of adapters. However, I really don't find any of them all that fun.

With the 2x crop factor my old "wide" 28mm suddenly gives the FoV of a 56mm lens. It also means I've got to manually focus it, which I don't really find that enjoyable unless I'm using a RF patch on a Leica. Focus peaking on the NEX wasn't too bad though I will admit.

Really though, it comes down to IQ and usability though and my 28mm f2.8 OM lens simply doesn't have any IQ gain over using an excellent lens like the native 25mm f1.4 Pan/Leica. In fact, the native lens performs better, not to mention being much faster.

Same story when it comes to my legacy 50's, the 45mm 1.8 is simply sharper and it can focus instantly rather than trying to muck about with a zoomed in image jumping about. Yes the stabilized EVF does help a lot, but its still pretty tough at longer focal lengths.

For anything truly wide, well you can forgot about that. No legacy glass out there is going to give me anything close to my 12mm Olympus. I could spend serious money on something like an old 18mm lens but yet again due to the crop factor its suddenly a 38mm, not wide at all.

Now its true that crop factor can come in handy with some telephotos, and I've had a little fun putting my Nikon 200-400 and 400 on my m4/3 cameras to get 800mm equiv.

Gives pretty sharp images too, but the thing is again, you've got to manually focus it which is difficult with long fast glass, not to mention carry it around.

Sure the 70-200 2.8 works pretty well, but its a 4lb lens with a camera hanging off the end. Not going to wear that around my neck. Rather I'll use the 7oz 45-175 which I can wear all day, that gives me AF and while a little slower just makes far more sense.

Really what it comes down to is if I'm willing to carry a 7lb lens around, such as a 200-400 f4, then there is no real advantage to the m4/3 cameras light weight. I might as well add another half a pound and take my D7000.

Yes I do give up .5x extra crop factor, but with the APS-C DSLR I gain great auto focus including tracking, and optical VF and a body that balanced far better on heavy glass.

Just no real point to seriously ever want to put my m4/3 body onto long glass, and as for short glass, well the native lens are sharper and faster in most cases, and there simply are no legacy wides that would actually be wide.

If you've got some stuff laying around, by all means, pick up a $10 ebay adapter, its fun for an afternoon and worth $10, but I really wouldn't suggest spending good money on high end adapters or buying lens with the purpose of using them on m4/3.



Jun 15, 2012 at 11:28 AM
millsart
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p.40 #11 · Olympus OM-D EM-5


Edgar Maguyon wrote:
So...who's going to start a dedicated "Olympus OM-D E-M5 Picture Thread", with more pics and less talk? ..I think it's about time




There already is a very popular m4/3 image thread in this very forum.

This thread is a great place to actually discuss the handling and ergonomics, lens choices etc of the Em-5 and that thread is a great place to actually show what they can do.



Jun 15, 2012 at 11:29 AM
millsart
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p.40 #12 · Olympus OM-D EM-5


Last of all, I finally got the Bower/Rokinon/Samyang 7.5mm m4/3 fisheye today.

I went for the Bower branded one because its $294 instead of $299 at B&H and they are all the same lens, might as well save $5 I figure.

I actually went for black. I saw some pics of the silver and it matched the body pretty closely but with the red band and chrome base I just thought the black looked better for some reason.

Just have been able to take some snaps around the house and have to go out of town this weekend to cover a race, but may try to take it along to play with some.

All and all it seems like a fantastic lens for the money. Very well built, very smooth focus ring and nice solid aperture ring as well. Not that you really need to stop it down much for DoF, its a FE after all lol

Seems quite sharp across the frame too. I don't have the Panny to compare it to but its certainly no Coke bottle.

Its a little bit of a specialty lens of course but for under $300 I think its going to be a lot of fun and also with some defishing software meet most of my ultra wide needs.

I used to own the 7-14 which is a fine lens, but not one that I shot very often or even carried. Simply wasn't getting $900 worth of value out of it.

Rather for around the same price I think I'll be very happy with this new FE and my Oly 12mm f2.0. The small size, sharpness and speed of the Oly make it a real favorite walk around lens for me. The fact its F2.0 means I can handhold with IBIS in some rather low light settings too which is really nice. I personally don't like to try to set up a tripod etc in a lot of places at night.

Sometimes 12mm just isn't wide enough though, and you can't always stitch so this should fit nicely for those occasional shots, such as the crowd shots I'm hired to where the promoters want to show how many people come out to events.

EM-5 with the FE and its flip down LCD will be just ideal for doing those camera over the head ultra wide shots.

To summarize, short of having any good shots to show, give this lens a try if your on the fence about it, I think you'll be very impressed with what $294 gets you



Jun 15, 2012 at 11:41 AM
kwalsh
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p.40 #13 · Olympus OM-D EM-5


I second the recommendation on the 7.5 - amazing lens for the price and just ridiculously sharp.

If you do LR/ACR I've created profiles for the lens with a number of projections for "de-fishing". I usually find de-fishing to recti-linear can be "over-doing" it so I modified the profiled recti-linear from the lens profile creator to a number of intermediate projections that I usually prefer (try stereo-graphic).

These profiles are for RAW, but you can easily modify them to JPEG (just use a text editor) if you are a JPEG shooter. Here's the link:

https://dl.dropbox.com/u/46420541/Rok7_5_lcp.zip

Ken

P.S. Early LR4 releases had a bug in the lens correction tool that can cause nasty edge effects in PV2012 with extreme corrections like a recti-linear de-fishing combined with things like increased clarity or contrast. I haven't checked if they are still present in LR4.1. It was reported to Adobe and repeated by a few folks. I think Eric Chan was taking a look at one point, but I don't know if there is a fix.



Jun 15, 2012 at 11:55 AM
bobbytan
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p.40 #14 · Olympus OM-D EM-5


millsart wrote:
I think you missed the sarcasm intended in that post first of all.

Second, I've got plenty of Nikon AI and AIs lens, my OM system glass still, some Canon and Pentax lens etc and a number of adapters. However, I really don't find any of them all that fun.

With the 2x crop factor my old "wide" 28mm suddenly gives the FoV of a 56mm lens. It also means I've got to manually focus it, which I don't really find that enjoyable unless I'm using a RF patch on a Leica. Focus peaking on the NEX wasn't too bad though I
...Show more

Naturally some 35mm lenses work better than others. I am thinking of the longer lenses that are relatively compact and light ... like the OM 55/1.2 ... Tamron SP 90/2.5 macro ... Canon 100/2.8L macro, 70-200/4L, 300/4L, etc.


Edited on Jun 15, 2012 at 12:19 PM · View previous versions



Jun 15, 2012 at 12:18 PM
millsart
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p.40 #15 · Olympus OM-D EM-5


Thanks Ken, I'll be sure to check those out

Being I'm not real knowledgeable in terms of all the different types of projections and such out there, and I'd guess maybe some others aren't as well, how would you say your methods differ from a plugin like the Fisheye Hemi one ?

I agree that I don't really like the rectiliner conversions as the edges just get such crazy perspective distortion it doesn't suit most images.

I've always liked fisheye wide shots because while wide, and having obvious distortion, they usually give a more, shall we say "natural" view of a scene.

I've found the Fisheye Hemi plugin to work nicely for keeping things looking natural and removing some obvious fisheye distortions but not totally stretching out every last pixel.

As I think their marking line used to go, "its for people" and I've found that to be quite true.



Jun 15, 2012 at 12:19 PM
bobbytan
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p.40 #16 · Olympus OM-D EM-5


millsart wrote:
There already is a very popular m4/3 image thread in this very forum.

This thread is a great place to actually discuss the handling and ergonomics, lens choices etc of the Em-5 and that thread is a great place to actually show what they can do.


I think we need a dedicated MFT or OM-D forum so it doesn't clog up or dominate the Alt Gear forum. Fred?



Jun 15, 2012 at 12:30 PM
millsart
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p.40 #17 · Olympus OM-D EM-5


bobbytan wrote:
I think we need a dedicated MFT or OM-D forum so it doesn't clog up or dominate the Alt Gear forum. Fred?



How does one long running thread dedicated to the OM-D and one long running m4/3 image thread "clog up" or dominate the Alt Gear forum ??

There is just as much talk about all things Leica and Zeiss and NEX etc as m4/3 if not more so.

Do we need a Leica dedicated forum and a Sony NEX forum as well ?



Jun 15, 2012 at 12:44 PM
bobbytan
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p.40 #18 · Olympus OM-D EM-5


millsart wrote:
How does one long running thread dedicated to the OM-D and one long running m4/3 image thread "clog up" or dominate the Alt Gear forum ??

There is just as much talk about all things Leica and Zeiss and NEX etc as m4/3 if not more so.

Do we need a Leica dedicated forum and a Sony NEX forum as well ?


Yes!



Jun 15, 2012 at 12:49 PM
kwalsh
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p.40 #19 · Olympus OM-D EM-5


millsart wrote:
Being I'm not real knowledgeable in terms of all the different types of projections and such out there, and I'd guess maybe some others aren't as well, how would you say your methods differ from a plugin like the Fisheye Hemi one ?

I've found the Fisheye Hemi plugin to work nicely for keeping things looking natural and removing some obvious fisheye distortions but not totally stretching out every last pixel.


The fisheye conversions you can do with lens corrections in LR are all radially symmetric. The ones I have in there are some standard projections that mostly lie between rectilinear and "equal area" (the typical projection of a fish-eye lens and a close match to the 7.5).

Hemi does something more clever which the LR tools don't support. Hemi uses different transforms in the vertical and horizontal dimensions. This is how it can play tricks like straightening vertical lines while letting horizontal ones bend so you end up with a projection that looks visually appealing without the extreme stretch of a rectilinear conversion. The projection Hemi uses is called the "Panini Projection" which was based on some painters' renderings of perspective. A nice short write up here:

http://www.newscientist.com/article/dn19054-18thcentury-painters-give-photography-new-perspective.html

So Hemi can definitely do more and can do it "better". My profiles were just an easy way to quickly find a better result in the fast LR workflow without needing to break out Hemi or Panotools.

Ken



Jun 15, 2012 at 01:17 PM
millsart
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p.40 #20 · Olympus OM-D EM-5


So rather than being able to see everything in one place, as most users here in the Alt Forum enjoy all the image threads and most have shot several systems you'd like to segregate everyone out and make us visit lots of different forums Why ?

Obviously Canon and Nikon have enough volume to warrant their own forums but when its basically a handful of guys, who mosty have a shared interest in all the alt systems and lenses anyways, whats to be gained ??

How would FM be a better place if we had a OM-D only forum with a handful of post ??

bobbytan wrote:
Yes!




Jun 15, 2012 at 01:24 PM
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