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Archive 2008 · G-EOS adapter latest status?

Anon Moss
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p.7 #1 · G-EOS adapter latest status?

Thanks for the info gents!

May 25, 2008 at 04:55 AM

montespluga
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p.7 #2 · G-EOS adapter latest status?

Does anybody can comment on distortions, as I might use that lens for architecture shots?

May 26, 2008 at 12:21 PM

hubsand
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p.7 #3 · G-EOS adapter latest status?

It has +3-4% barrel distortion at 14mm, grading down to dead neutral at about 19mm, rising to +1 pincushion distortion at 24mm.

May 26, 2008 at 12:24 PM

montespluga
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p.7 #4 · G-EOS adapter latest status?

thanks, Mark, that looks good!, as I'd be interested in the 16 mm - 21 mm-range
So how do you correct it?

You wrote: "By default, they're EXIF coded for the 14-24mm f2.8, but the...."

If I understand correctly, the EXIFs have the information of the zoom range as well; example 15 mm or 19 mm.... this helps a lot when correcting distortion with software...

By interpretating correctly your tests, the 14-24 would be close to the Distagon 21 with the 1 Ds-2? you did mentioned, that it required the Mk 3 for seeing a difference...

May 26, 2008 at 12:38 PM

hubsand
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p.7 #5 · G-EOS adapter latest status?

That's right: I haven't published the 5D / 14-24 v CZ21 test yet, but that's pretty much the bottom line overall. The uniform barrel correction in the 14-19mm range is not problematic to correct: actually a simple Spherize does the trick perfectly for geometry, but PTLens makes a better job of retaining resolution.

Edited on May 26, 2008 at 12:52 PM

May 26, 2008 at 12:52 PM

marcwilson
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p.7 #6 · G-EOS adapter latest status?

...so on a canon body, and using Ptlens software or similar, the nikon lens and adaptor is as easy to correct distortions etc as a canon lens?

May 26, 2008 at 02:31 PM

hubsand
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p.7 #7 · G-EOS adapter latest status?

Depending on which application you use, there may be a pre-profiled setting for the lens you're using. The app may read the EXIF and apply appropriate correction. Chip-encoded adaptors can only report a single focal length, so ours is encoded for the midpoint of a 14-24mm zoom.

If you're using a program with a module for the 14-24mm, it will only therefore apply at 19mm. So, no, you'll need to work out the correction settings and save them as presets. If I get a really rainy day, I'll work out and post the PT figures for 14mm and 17mm. But really, don't let that stop anyone else beating me to it . . . !

May 26, 2008 at 04:20 PM

montespluga
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p.7 #8 · G-EOS adapter latest status?

Mark, if you have the settings for all the focal lenghts, you can create a new profile, so it's not problem, as long as you still know the focal lenghts applied in the shots. Some paper and pen might be a good help when shooting...

May 26, 2008 at 04:34 PM

jjlphoto
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p.7 #9 · G-EOS adapter latest status?

If you limit your use to only 14mm, 19mm, and 24mm, and have profiles built in either Lensfix or PT Lens, then you can try just three settings to see which one does the proper job.

May 26, 2008 at 04:59 PM

montespluga
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p.7 #10 · G-EOS adapter latest status?

John

that's really not what I'm looking for; I'd rather invest a bit of time to calibrate; either for PTLens/Lensfix, then PTGui's lens-settings can be applied, as this is the same family; or with Lenscorrector from www.proxel.se. Easy with the later tool to calibrate a lens

May 26, 2008 at 05:43 PM

jjlphoto
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p.7 #11 · G-EOS adapter latest status?

That's 11 settings. Sure, you can easily make profiles for all of them, but when you are out shooting, I would think it would be difficult and cumbersome to track each exposure and focal length. For my zooms, I just make profiles for the focal lengths marked on the barrel, and when shooting in the field, I try just to use those to keep things simple.

The Proxel software looks cool. Can it deal with complex mustache/gull wing distortion?

Edited on May 26, 2008 at 10:08 PM

May 26, 2008 at 10:06 PM

montespluga
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p.7 #12 · G-EOS adapter latest status?

jjlphoto wrote:

The Proxel software looks cool. Can it deal with complex mustache/gull wing distortion?

Send me a distagon 21.....

Which other ones are mustaches?

Any chances to get a 17 mm-RAW?

Edited on May 26, 2008 at 11:01 PM

May 26, 2008 at 10:29 PM

montespluga
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p.7 #13 · G-EOS adapter latest status?

Beeing a architecture photographer, I'm interested in the Sharpness curvature of field of that lens; I noticed some canon lenses having different one's, than some other brands.

Edited on May 27, 2008 at 10:49 AM

May 27, 2008 at 10:24 AM

hubsand
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p.7 #14 · G-EOS adapter latest status?

Some of the delays in recent supply have been cause by a redesign of the Chinese Elefoto/Fotodiox Nikon adaptor, but my batch of the new designs has been confirmed as having shipped over a week ago, so we should be back in business.

I have now also secured an alternate source of the original adaptors and have a batch en-route also. So, all in all, we should very soon now be in the position of being able to offer Canon users the 14-24G adaptor ex-stock – painlessly.

Apologies to everyone kept waiting. Thanks for your patience!

Edited on May 29, 2008 at 04:08 PM

May 29, 2008 at 04:08 PM

montespluga
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p.7 #15 · G-EOS adapter latest status?

Mark. any raw idea about the appearance of the lever version?
I might need the lens in September.....

from the other thread:
"......additional 1 Series AF-enabling pin..... "

Do you mean by that the special pin, which is required for the D-series only; cause they have a slightly different mount? So the same function as the cardboard, proposed by happypagehk, on early YCZ-adaptors?

Edited on May 29, 2008 at 09:42 PM

May 29, 2008 at 09:32 PM

hubsand
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p.7 #16 · G-EOS adapter latest status?

HappyPage actually performs the chip and pin modification for our G-EF adaptor. On a 1Ds, the AF-confirm on-adaptor chips don't work properly unless a microswitch inside the lens mount is activated first. On a 5D, it's not required, but I decided to spec every adaptor with it (at greater cost!) so 5D upgraders won't be caught out.

Edited on May 29, 2008 at 10:38 PM

May 29, 2008 at 10:38 PM

montespluga
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p.7 #17 · G-EOS adapter latest status?

does the white cardboard indicates the microswitches position?

Very good you added this AF-enabling pin, as I stopped using the the "AF-confirm on-adaptor" in AF-mode: taking the little cardboard away when changing from the exotic lens to a canon lens, was a hazzle. AFAIK some canon lens need that microswitch beeing in the other position.

May 29, 2008 at 11:01 PM

Gib Robinson
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p.7 #18 · G-EOS adapter latest status?

Mark,

Glad to here supplier issues are clearing up. I've got an extended photo trip starting July 15. If I can get an adapter before that date, I'm ready to order. (You can let me know by PM)

Edited on May 29, 2008 at 11:56 PM

May 29, 2008 at 11:55 PM

hubsand
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p.7 #19 · G-EOS adapter latest status?

The outlook is more promising on the supply front: Fotodiox are expecting a large batch of adaptors any day now. But given the troubles of the last few months, I'm reluctant to make firm promises until I have them in my hand. We have a saying in England: don't count chickens until they hatch.

May 30, 2008 at 07:51 AM

brainiac
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p.7 #20 · G-EOS adapter latest status?

chicks.

May 30, 2008 at 03:40 PM

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