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11-16-2022, 07:03 AM   #1
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HELP : Can 1800$ lens: Olympus 7-14mm f/4 Zuiko Digital work auto with Pentax body?

Hi

There a US$1800 fish eye lens of Olympus and we try to find way if there is any adopter that can make it fit on KAF2 and with AUTO focus/even auto aperture functions....

IS IT POSSIBLE and with what product? ( ie name)

Or esle, what are our options.

A "Swiss" retailers told us that it's feasible on Canon or Nikon.

THANKS!!!!


Last edited by Athanassios; 12-19-2022 at 10:32 AM.
11-16-2022, 07:05 AM - 2 Likes   #2
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No.

Look at the Pentax DA 10-17. Or one of the third party primes in that focal range which give a fish eye effect. There are a couple out there.
11-16-2022, 07:26 AM   #3
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You would probably be able to mount it on a Pentax Q body with an adapter but I don't think there's any adapter that would allow you to retain electronics for auto-aperture and/or autofocus.

For Pentax K bodies I'd also recommend the DA 10-17 if you need a fisheye lens. Other options include the older Sigma EX fisheye 15mm prime which would also allow auto everything. If you can live without autofocus then there's also the 8mm Samyang fisheye for the K mount.
11-16-2022, 07:50 AM - 1 Like   #4
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QuoteOriginally posted by Midorime Quote
You would probably be able to mount it on a Pentax Q body with an adapter but I don't think there's any adapter that would allow you to retain electronics for auto-aperture and/or autofocus.
I suspect it is functional on Canon and Nikon MILC bodies, but not even Pentax lenses accept AF / aperture commands from Pentax “Q” bodies.

11-16-2022, 07:54 AM   #5
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QuoteOriginally posted by reh321 Quote
I suspect it is functional on Canon and Nikon MILC bodies, but not even Pentax lenses accept AF / aperture commands from Pentax “Q” bodies.
As far as I understand correctly this is a m4/3 lens which likely wouldn't cover even the APS-C image circle for Canon/Nikon mirrorless or if it does there's probably heavy vignetting. My comment was just to point out that you could probably physically fit it to a Q body and retain infinity focus while covering the full image circle of the sensor. I agree that you aren't going to get auto anything from this lens with any pentax body.
11-16-2022, 10:49 AM - 1 Like   #6
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It will be basically impossible to adapt to Pentax in any meaningful way because the registration distance is also too short (along with the image circle being calibrated for 4/3 and therefore too small).

I also don't believe it is a fisheye - it is a rectilinear ultrawide zoom equivalent to a 14-28 on FF in terms of angle of view (or close enough net of different aspect ratios of 4:3 vs 3:2).

Pentax does make the 15-30 for FF and the 11-18 for APS-C which are the closest equivalents, and at least in Canada, both cost significantly less than $1800 USD.
11-16-2022, 10:55 AM   #7
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QuoteOriginally posted by jslifoaw Quote
It will be basically impossible to adapt to Pentax in any meaningful way because the registration distance is also too short (along with the image circle being calibrated for 4/3 and therefore too small).

I also don't believe it is a fisheye - it is a rectilinear ultrawide zoom equivalent to a 14-28 on FF in terms of angle of view (or close enough net of different aspect ratios of 4:3 vs 3:2).

Pentax does make the 15-30 for FF and the 11-18 for APS-C which are the closest equivalents, and at least in Canada, both cost significantly less than $1800 USD.
I checked and Jslifoaw is absolutely correct, it is a rectilinear lens and not a fisheye. In this case I would second these suggestions of the 15-30 and 11-18mm from Pentax depending on your camera body and sensor size. There's also the 3.8-5.9mm for the Q system if your camera is from the Pentax Q line.

11-16-2022, 11:11 AM - 3 Likes   #8
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Just to correct some confusion. The lens shown is a 4/3 lens not a micro 4/3 lens. It is designed for an older DSLR system not mirrorless. It has a 38.67mm flange distance vs Pentax 45.46mm. Nikon F is even longer at 46.50mm.

As far as I know there might be a passive adapter using a cheap teleconverter to make this work but it will lose the angle of view and may not fully work (aperture automation, autofocus for example both will not work).

---------- Post added 11-16-22 at 01:13 PM ----------

There is an adapter that allows some of these lenses to work on m43 but there are limitations on how well they work as some of the lenses struggle on most bodies.
11-16-2022, 11:15 AM - 1 Like   #9
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And after all the confusion the bottom line is you're better off finding a native lens, it's probably not worth trying to get this to work on a Pentax body.
11-16-2022, 11:24 AM - 1 Like   #10
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A 7-14 mm lens for aps-c or FF does not need to be autofocus.
11-16-2022, 01:55 PM - 1 Like   #11
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QuoteOriginally posted by pschlute Quote
A 7-14 mm lens for aps-c or FF does not need to be autofocus.
While true there isn’t a way to adapt this and if you adapt it aperture may be difficult to control.
11-16-2022, 06:01 PM   #12
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By far better to get an Olympus camera to use it on. Otherwise you either need to add glass between the lens and the camera, or remove the mount and recalibrate or cut internal structures to get from the 45mm to 36mm?
Edit 38.67mm
11-16-2022, 08:37 PM   #13
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QuoteOriginally posted by swanlefitte Quote
By far better to get an Olympus camera to use it on. Otherwise you either need to add glass between the lens and the camera, or remove the mount and recalibrate or cut internal structures to get from the 45mm to 36mm?
Edit 38.67mm
Right - and even with Oly - the 7-14 is one of the "non-CDAF optimized" lenses. It relies on PDAF and only the EM1 m4/3 bodies had that in the past (unclear if any EM5's now have it but I don't think so). As such it was slow focusing on anything other than the EM1 series.

This site is gone but it was a wealth of info. The internet archive preserved the content:
The Complete Micro 4/3 Lens List

Scroll down towards the section discussing 4/3 lenses and you will find this in the Non-optimized section.
11-17-2022, 05:14 AM - 1 Like   #14
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Thank you ALL for the interest and replies given. I think it's wiser the Olympus to be sold on eBay or FB Marketplace and with the proceeeds purchase a Pentax 10-17 which is sadly not HD and I hear to soon be discontinued.
11-17-2022, 06:52 AM - 1 Like   #15
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this lens exhibits what was wrong about the 4/3 system initially. look at the price / cost of this lens. you can get the equivalent FOV on a APS-C body with a sigma APO DC 10-20. EX or perhaps the Pentax 12-24 when it was available at about 1/3 the price.

At the time an ultrawide for 4/3 was prohibitively expensive compared to the APS-C cameras from any maker.

the only way to make effective use of this lens is on a 4/3 body or perhaps a mirrorless, but it is hard to say what the actual sensor coverage (image circle) of the lens is
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