topic Re: Tokina 28-70mm f/2.8 ATX Pro Lens in EF & RF Lenses

Tokina 28-70mm f/2.8 ATX Pro Lens

RPCrowe — Sun, 12 Aug 2018 17:06:35 GMT

I use an older Tokina 28-70mm f/2.8 ATX Pro (not the SV model) which I love. However, the camera's EXIF data recognizes this lens as a Canon 28-70mm f/3.5-5.6. How can I change the EXIF to read the correct lens or to read no lens at all rather than the incorrect model?

Re: Tokina 28-70mm f/2.8 ATX Pro Lens

kvbarkley — Sun, 12 Aug 2018 18:17:00 GMT

Use ExifTool. There is no way to do it in the camera.

Re: Tokina 28-70mm f/2.8 ATX Pro Lens

ebiggs1 — Sun, 12 Aug 2018 19:41:55 GMT

Why? It doesn't matter. DPP4 won't correct for it and LR lets you select which lens correction you want.

Re: Tokina 28-70mm f/2.8 ATX Pro Lens

Waddizzle — Sun, 12 Aug 2018 22:38:48 GMT

@ebiggs1 wrote:
Why? It doesn't matter. DPP4 won't correct for it and LR lets you select which lens correction you want.

Yup, you’re right. AND. Does not LR allow you to overwrite the EXIF data, too?

Re: Tokina 28-70mm f/2.8 ATX Pro Lens

shadowsports — Sun, 12 Aug 2018 23:06:15 GMT

RPCrowe,

If you want support for that lens, you're going to have to pick a 3rd party program for post processing and get them to add it.

Its not supported in LR or Camera RAW. Not supported in PhotoLab (DxO). Only the "SV" model is supported in Affinity Pro

I sent you a PM with some links.

Re: Tokina 28-70mm f/2.8 ATX Pro Lens

RPCrowe — Sun, 12 Aug 2018 23:12:44 GMT

I am not looking for support. It is just a Pita every time I post an image on this site and the wrong lens pops up,,,

Re: Tokina 28-70mm f/2.8 ATX Pro Lens

Waddizzle — Mon, 13 Aug 2018 00:51:19 GMT

@shadowsports wrote:
RPCrowe,
If you want support for that lens, you're going to have to pick a 3rd party program for post processing and get them to add it.

Its not supported in LR or Camera RAW. Not supported in PhotoLab (DxO). Only the "SV" model is supported in Affinity Pro

I sent you a PM with some links.

Perhaps not. I would not know. But, I do know that LR allows you to build your own correction profile.

Re: Tokina 28-70mm f/2.8 ATX Pro Lens

RobertTheFat — Mon, 13 Aug 2018 02:40:11 GMT

@RPCrowe wrote:
I use an older Tokina 28-70mm f/2.8 ATX Pro (not the SV model) which I love. However, the camera's EXIF data recognizes this lens as a Canon 28-70mm f/3.5-5.6. How can I change the EXIF to read the correct lens or to read no lens at all rather than the incorrect model?

The mis-identification of the lens is clearly a bug, but is it the fault of the camera or of the photo editor you're using? To find that out, you need to try it on more than one camera and with more than one photo editor. If it's in the camera, Canon should correct it in the next firmware release (and would, I think, want to do so). If it's in the editor, that should be fixable as well, assuming that the authors of the software care enough.

A third possibility, much less likely than the other two, is that the lens has successfully fooled the camera into thinking that it's really a Canon lens. I suppose Canon would want to fix that too, but it might be more of an undertaking. If it required a change to how their lens reports itself, older copies of that lens would presumably be mis-identified in the future.

Re: Tokina 28-70mm f/2.8 ATX Pro Lens

Waddizzle — Mon, 13 Aug 2018 07:43:06 GMT

@RobertTheFat wrote:
@RPCrowe wrote:
I use an older Tokina 28-70mm f/2.8 ATX Pro (not the SV model) which I love. However, the camera's EXIF data recognizes this lens as a Canon 28-70mm f/3.5-5.6. How can I change the EXIF to read the correct lens or to read no lens at all rather than the incorrect model?
The mis-identification of the lens is clearly a bug, but is it the fault of the camera or of the photo editor you're using? To find that out, you need to try it on more than one camera and with more than one photo editor. If it's in the camera, Canon should correct it in the next firmware release (and would, I think, want to do so). If it's in the editor, that should be fixable as well, assuming that the authors of the software care enough.

A third possibility, much less likely than the other two, is that the lens has successfully fooled the camera into thinking that it's really a Canon lens. I suppose Canon would want to fix that too, but it might be more of an undertaking. If it required a change to how their lens reports itself, older copies of that lens would presumably be mis-identified in the future.

I think your third possibility is far and way the most likely explanation. The lens is fooling the camera. The camera does not contain a database of every lens ever made. The lens identifies itself to the camera body.

I’d bet if you tried the lens on a different body, you would get the same result.

Re: Tokina 28-70mm f/2.8 ATX Pro Lens

ebiggs1 — Mon, 13 Aug 2018 13:25:28 GMT

"A third possibility, much less likely than the other two, ..."

Glad you opined, "much less likely", Robert because that is nonsense.

Re: Tokina 28-70mm f/2.8 ATX Pro Lens

RobertTheFat — Mon, 13 Aug 2018 15:15:42 GMT

@ebiggs1 wrote:
"A third possibility, much less likely than the other two, ..."

Glad you opined, "much less likely", Robert because that is nonsense.

Well, I'm not sure I'd go so far as to call it nonsense, but it does presuppose an unlikely degree of carelessness in how Canon identifies their lenses to their cameras. It's certainly an odd situation, and it will be interesting to learn what the OP is able to determine if he runs some tests.

Re: Tokina 28-70mm f/2.8 ATX Pro Lens

ebiggs1 — Mon, 13 Aug 2018 16:05:41 GMT

Robert you make the case for nonsense with your own answer. I can imagine some legal problems if that idea was intentional.