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Sigma 12-24mm EX DG with Dynax 7 issue

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kindgott View Drop Down
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Post Options Post Options   Quote kindgott Quote  Post ReplyReply Direct Link To This Post Topic: Sigma 12-24mm EX DG with Dynax 7 issue
    Posted: 08 September 2021 at 09:13
Hi everyone,

Recently I got a pristine Dynax 7 which works great. I have tried several lenses without issues, but when mounting the Sigma 12-24mm F4.5-5.6 EX DG (first version) I get a "tunnel vision" effect in the viewfinder. I am surprised, because this lens is FF and in fact I used it with my A900 and with the LA-EA3 on my A7S.

Has anyone tried this lens with a Minolta film camera? Is this supposed to happen, or am I being a total noob and some setting is required on the camera or the lens to make it work with the Dynax 7? I feel like a total beginner :D

Thanks.
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Idleidolidyll View Drop Down
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Post Options Post Options   Quote Idleidolidyll Quote  Post ReplyReply Direct Link To This Post Posted: 08 September 2021 at 10:28
I have that lens AND I have a Minolta Alpha 7. I just fitted it: works perfectly.
Zooms full frame as expected
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Post Options Post Options   Quote Idleidolidyll Quote  Post ReplyReply Direct Link To This Post Posted: 08 September 2021 at 10:30
Note: the lens hood is two piece. Make sure you take both the cap and the round hood off. That leaves a petal shaped hood.
If you don't take the round hood off, you WILL get a round image
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kindgott View Drop Down
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Post Options Post Options   Quote kindgott Quote  Post ReplyReply Direct Link To This Post Posted: 08 September 2021 at 10:41
Originally posted by Idleidolidyll Idleidolidyll wrote:

Note: the lens hood is two piece. Make sure you take both the cap and the round hood off. That leaves a petal shaped hood.
If you don't take the round hood off, you WILL get a round image


Thanks Idleidolidyll, I am pretty sure I removed the round hood but I will double check once I'm at home. In fact I remember the image on the viewfinder does not show a small vignette, but a huge one - more like a tunnel vision effect. I guess the round hood just makes a smaller vignetting effect, rather than what I see.
But will revert once I can test, thanks.
https://www.flickr.com/photos/dante1334/
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Post Options Post Options   Quote Idleidolidyll Quote  Post ReplyReply Direct Link To This Post Posted: 08 September 2021 at 10:44
The round hood works fine with APS-C cameras but definitely vignettes full frame. If you don't see the portal shaped hood, you probably haven't removed the outer hood.
Good luck, hope it's that simple.

Edited by Idleidolidyll - 08 September 2021 at 20:29
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kindgott View Drop Down
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Post Options Post Options   Quote kindgott Quote  Post ReplyReply Direct Link To This Post Posted: 08 September 2021 at 18:09
Originally posted by Idleidolidyll Idleidolidyll wrote:

The round hood world fine with APS-C cameras but definitely vignettes full frame. If you don't see the portal shaped hood, you probably haven't removed the outer hood.
Good luck, hope it's that simple.


Oh my god, I am so idiot. It was the outer hood indeed. Seems like I always kept it on and didn't even consider that. Thanks a lot for the common sense, Idleidolidyll!
https://www.flickr.com/photos/dante1334/
 



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Idleidolidyll View Drop Down
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Post Options Post Options   Quote Idleidolidyll Quote  Post ReplyReply Direct Link To This Post Posted: 08 September 2021 at 20:31
Originally posted by kindgott kindgott wrote:


Oh my god, I am so idiot. It was the outer hood indeed. Seems like I always kept it on and didn't even consider that. Thanks a lot for the common sense, Idleidolidyll!


You're welcome. It's easy to do with that lens. It's a most unusual arrangement and, removing the lens cap alone, you might never realise the double lens hood even existed.
The Art of Photography
https://silvergrainclassics.com/en/2021/02/mike-breen-new-zealand-experimental-photographer/
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