Anyone here ever converted K mount to F mount and retained full functionality?

solitudebound · 08-12-2018, 05:40 AM

Originally posted by Rondec

I think that was in the past when Pentax was still using a mechanical aperture lever. Now that they have Kaf 4 cameras that don't need lenses with a mechanical aperture lever I don't think it is any harder to make k mount lenses than for any other mount. The bigger issue for Sigma is that they don't sell very many Pentax mount lenses compared to other brands and so it isn't worth it to them to make them.

Fair enough. Although the same Sigma 18-35 art on Canon cameras has similar problems. Never had a problem with the 50-500 sigma on either K-3 or K-1 and it was converted from a Sigma SA mount since it didn't have OS.

**boriscleto** · 08-12-2018, 05:51 AM

Originally posted by Nass

The reason I asked - www.photomacrography.net :: View topic - How to convert a Pentax K-1 to Nikon mount

A fellow on another forum removed the K mount on a K1 and put on a Nikon mount.

He wanted K1 for pixel shift, this is a specialist extreme macro forum I participate in.

Very brave, and I wondered if anyone here had done it!

Cheers

Well that is certainly possible. Adaptist had the Multi-Mount, currently sold out, that allowed Nikon, Olympus, Contax/Yashica, Konica, and M4/3 to be mounted. It did this at the cost of making the camera less than WR.

Adaptist - Home

You didn't get full functionality from anything but K-mount of course. Everything else works like an M lens, but that doesn't really matter for macro other than flash automation.

**UncleVanya** · 08-12-2018, 09:08 AM

Originally posted by Nass

The reason I asked - www.photomacrography.net :: View topic - How to convert a Pentax K-1 to Nikon mount

A fellow on another forum removed the K mount on a K1 and put on a Nikon mount.

He wanted K1 for pixel shift, this is a specialist extreme macro forum I participate in.

Very brave, and I wondered if anyone here had done it!

Cheers

If they are ever in stock again there is a mount called Adaptist that is designed to replace the K mount on a Pentax and allows mounting several different lens types including Nikon more securely than the method I mentioned.

Products - Adaptist Let them know if you are interested so they know if they should restart manufacturing.

**UncleVanya** · 08-12-2018, 09:10 AM

Originally posted by boriscleto

Well that is certainly possible. Adaptist had the Multi-Mount, currently sold out, that allowed Nikon, Olympus, Contax/Yashica, Konica, and M4/3 to be mounted. It did this at the cost of making the camera less than WR.

Adaptist - Home

You didn't get full functionality from anything but K-mount of course. Everything else works like an M lens, but that doesn't really matter for macro other than flash automation.

And they didn't offer open aperture metering with most I thought - more like M42 - set on AV, control from lens with aperture lever. Right?

**boriscleto** · 08-12-2018, 09:15 AM

Originally posted by UncleVanya

And they didn't offer open aperture metering with most I thought - more like M42 - set on AV, control from lens with aperture lever. Right?

Well the Green Button isn't going to stop them down obviously...they would work like M42 in M mode or AV.

**UncleVanya** · 08-12-2018, 09:23 AM

Originally posted by boriscleto

Well the Green Button isn't going to stop them down obviously...they would work like M42 in M mode or AV.

Gotcha!

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08-12-2018, 05:40 AM	#16
solitudebound Senior Member Join Date: Oct 2017 Posts: 140	Originally posted by Rondec I think that was in the past when Pentax was still using a mechanical aperture lever. Now that they have Kaf 4 cameras that don't need lenses with a mechanical aperture lever I don't think it is any harder to make k mount lenses than for any other mount. The bigger issue for Sigma is that they don't sell very many Pentax mount lenses compared to other brands and so it isn't worth it to them to make them. Fair enough. Although the same Sigma 18-35 art on Canon cameras has similar problems. Never had a problem with the 50-500 sigma on either K-3 or K-1 and it was converted from a Sigma SA mount since it didn't have OS.

08-12-2018, 05:51 AM	#17
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,475	Originally posted by Nass The reason I asked - www.photomacrography.net :: View topic - How to convert a Pentax K-1 to Nikon mount A fellow on another forum removed the K mount on a K1 and put on a Nikon mount. He wanted K1 for pixel shift, this is a specialist extreme macro forum I participate in. Very brave, and I wondered if anyone here had done it! Cheers Well that is certainly possible. Adaptist had the Multi-Mount, currently sold out, that allowed Nikon, Olympus, Contax/Yashica, Konica, and M4/3 to be mounted. It did this at the cost of making the camera less than WR. Adaptist - Home You didn't get full functionality from anything but K-mount of course. Everything else works like an M lens, but that doesn't really matter for macro other than flash automation.

08-12-2018, 09:08 AM	#18
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,401	Originally posted by Nass The reason I asked - www.photomacrography.net :: View topic - How to convert a Pentax K-1 to Nikon mount A fellow on another forum removed the K mount on a K1 and put on a Nikon mount. He wanted K1 for pixel shift, this is a specialist extreme macro forum I participate in. Very brave, and I wondered if anyone here had done it! Cheers If they are ever in stock again there is a mount called Adaptist that is designed to replace the K mount on a Pentax and allows mounting several different lens types including Nikon more securely than the method I mentioned. Products - Adaptist Let them know if you are interested so they know if they should restart manufacturing.

08-12-2018, 09:10 AM	#19
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,401	Originally posted by boriscleto Well that is certainly possible. Adaptist had the Multi-Mount, currently sold out, that allowed Nikon, Olympus, Contax/Yashica, Konica, and M4/3 to be mounted. It did this at the cost of making the camera less than WR. Adaptist - Home You didn't get full functionality from anything but K-mount of course. Everything else works like an M lens, but that doesn't really matter for macro other than flash automation. And they didn't offer open aperture metering with most I thought - more like M42 - set on AV, control from lens with aperture lever. Right?

08-12-2018, 09:15 AM	#20
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,475	Originally posted by UncleVanya And they didn't offer open aperture metering with most I thought - more like M42 - set on AV, control from lens with aperture lever. Right? Well the Green Button isn't going to stop them down obviously...they would work like M42 in M mode or AV.

08-12-2018, 09:23 AM	#21
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,401	Originally posted by boriscleto Well the Green Button isn't going to stop them down obviously...they would work like M42 in M mode or AV. Gotcha!