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02-01-2019, 09:57 AM   #1
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You CAN Use Pentax Lenses On The New Panasonic Full Frame Cameras!

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I've recently been reviewing specs and reviews on the two new Panasonic full-frame mirrorless cameras that will be available soon. It's interesting how these new cameras are featuring IBiS and Pixel Shift - two features that Pentax has already had for years in their cameras.
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I just checked the B&H website, and they are already selling adapters that would enable future Panasonic S1 and S1R owners to use Leica (R or M), Pentax K, Nikkor, or even M42 lenses on these new cameras (albeit in manual focus mode only)! That's great news for me, I never use auto focus lenses on my K-1's. So, if I were to someday buy the Panasonic S1, I would not need to replace any of my existing premium manual-focus lenses.

What's the future hold for me? Not sure, but if Pentax doesn't come out with a new full frame body with better video and the latest in stills features in the next couple of years, I will likely buy the Panasonic S1 body with adapters for my next full-frame camera.
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Last edited by Fenwoodian; 02-01-2019 at 03:30 PM.
02-01-2019, 10:41 AM   #2
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QuoteOriginally posted by Fenwoodian Quote
What's the future hold for me? Not sure, but if Pentax doesn't come out with a new full frame body with better video and the latest in stills features in the next couple of years, I will likely buy the Panasonic S1 body with the above 3 adapters for my next full-frame camera.
Wait until AF performance is understood. And for me, I do NOT see much difference in IQ between all these new FF models to justify spending for a new bodies and new lenses: from Sony to Nikon to Pentax to Panasonic, it's all the same Sony sensor tech inside. I've compared full size images from the S1 and S1R to Pentax K1, and for me it's all the same, only medium format would give me more. Then there is video, yes, but IMO the really interesting feature of video is to be able to get slow motion (my phone does it, can be useful), more interesting than 4K. BTW, the 100Mpixels and 300Mpixels claim on the S1 and S1R is a lot of empty pixels because good luck for getting 300Mpixel resolution out of a 24x36 zoom optic. With my K1 II, pixel shift with 28-105 or 24-70, I can already see diffraction limiting pixel shift resolution from f5.6 and up... so good luck to get even 100Mp resolution our of a 24-105 f4 on the S1 with the anti-alias filter, or 300Mp resolution on the S1R with the lens wide open at f4.

Last edited by biz-engineer; 02-01-2019 at 11:01 AM.
02-01-2019, 10:58 AM   #3
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QuoteOriginally posted by Fenwoodian Quote
Panasonic S1 and S1R
Wich one of those does appeal the most to you and why?
02-01-2019, 11:07 AM   #4
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QuoteOriginally posted by biz-engineer Quote
Wait until AF performance is understood. And for me, I do NOT see much difference in IQ between all these new FF models to justify spending for a new bodies and new lenses: from Sony to Nikon to Pentax to Panasonic, it's all the same Sony sensor tech inside. I've compared full size images from the S1 and S1R to Pentax K1, and for me it's all the same, only medium format would give me more. Then there is video, yes, but IMO the really interesting feature of video is to be able to get slow motion (my phone does it, can be useful), more interesting than 4K.
HLG photo mode for increased dynamic range, "AI" (artificial inteligence) autofocus, 8-shot pixel shift, 6K burst shooting mode for fast action, dual image stabilization that combines both the camera's IS with the lens' IS for improved IS over just IBIS alone , automatic in-camera focus stacking, and many other of the latest stills features clearly differentiate these new Panasonic cameras from the current K-1 (and most other full frame flag ship cameras too).

And of course the K-1's video capability is no where near what these Panasonic cameras can do with video.


Last edited by Fenwoodian; 02-01-2019 at 03:31 PM.
02-01-2019, 11:09 AM - 1 Like   #5
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QuoteOriginally posted by RonHendriks1966 Quote
Wich one of those does appeal the most to you and why?
The S1 because it does better video, is cheaper, AND my current desktop computers would likely struggle with the insanely HUGE pixel shift files from the S1R.
02-01-2019, 11:16 AM   #6
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I prefer my own intelligence to recognize the subject and focus on it, instead of having to teach the camera how to focus on an animal. No saying those cameras are no good, just saying a lot of the features are gadgets.
02-01-2019, 11:21 AM   #7
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QuoteOriginally posted by biz-engineer Quote
so good luck to get even 100Mp resolution our of a 24-105 f4 on the S1 or 300Mp resolution on the S1R with the lens wide open at f4.
Good point. One would not want to use such average quality zoom lenses on these new Panasonic bodies in their 8-image pixel shift (Hi Res) mode. These new Panasonic cameras will demand the best premium prime lenses (which is what I already have, Zeiss Milvus, etc.) for optimum IQ.

Last edited by Fenwoodian; 02-01-2019 at 11:29 AM.
02-01-2019, 11:32 AM   #8
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QuoteOriginally posted by Fenwoodian Quote
Good point. One would not want to use such average quality zoom lenses on these new Panasonic bodies in their 8-image pixels shift mode. These new Panasonic cameras demand the best premium prime lenses (which is what I already have, Zeiss Milvus, etc.).

Note: I didn't imply that the zooms aren't good, I guess those new zooms from Panasonic are good. Regardless of being prime or zooms, for focal length other than wide angle it may be a challenge to take advantage of pixel shift. Pixel shift is nice to have when it's free of charge, because not all shooting conditions are suitable to take advantage of PS. Anyway, I have no doubt that those two newer camera models are excellent (still would like to see for AF), but that's almost always the case of new camera models. It always beg the question whether the added features will make the difference in real life shooting conditions. I usually put camera into two broad categories: sport and stills. For still, AF speed isn't very relevant because of the time needed to compose images for that style of shooting, faster AF isn't a valuable advantage, sensor size it, can even use manual lenses, all the rest is gadget. For sports moving shots, very significant AF speed is needed, lower resolution frees up the speed.

Video is quite different from photography in a way that it doesn't require high resolution/large sensor, the reason being that the eye is slow to react to motion pictures, any video specialist know that, movies have been made with much lower resolution and smaller sensor for very long time. When I studied video, what I learned was that eye physiology was such that high res. video transmission was not needed , that was based on exploiting limited sensitivity of the eye to dynamic images that TV was possible for many decades while using rather limited bands in the frequency spectrum.

02-01-2019, 11:44 AM   #9
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Are the available adapters setup to control aperture or do they only work with lenses with aperture rings?
02-01-2019, 11:56 AM   #10
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QuoteOriginally posted by UncleVanya Quote
Are the available adapters setup to control aperture or do they only work with lenses with aperture rings?
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Mixed bag - depending on the manufacturer and the price.

Fortunately for us Pentax K lens owners, this Novoflex K to L adapter does have a built in aperture ring; so it can be used with Pentax K mount lenses that have an aperture ring AND with those that do not. I've owned other Novoflex adapters, and while on the expensive side, I found that they were very well made and worked great.
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Last edited by Fenwoodian; 02-01-2019 at 12:12 PM.
02-01-2019, 11:58 AM   #11
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QuoteOriginally posted by UncleVanya Quote
Are the available adapters setup to control aperture or do they only work with lenses with aperture rings?
For this Pentax made the HD FA 35mm f/2.0 with aperture ring.
02-01-2019, 12:11 PM   #12
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QuoteOriginally posted by RonHendriks1966 Quote
For this Pentax made the HD FA 35mm f/2.0 with aperture ring.
Indeed.


These days I would not buy a lens that did not have an aperture ring on the lens itself. Just in case I choose to switch from Pentax to another manufacturers body at some point in the future.
02-01-2019, 12:55 PM   #13
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QuoteOriginally posted by Fenwoodian Quote
What's the future hold for me? Not sure, but if Pentax doesn't come out with a new full frame body with better video
QuoteOriginally posted by Fenwoodian Quote
And of course the K-1's video capability is no where near what these Panasonic cameras can do with video
Rather than spend big on an expensive full frame camera just for sometime video, get a cheap Panasonic G7 or G85 body with their kit lens and a few adapters for your lenses.
02-01-2019, 01:13 PM - 1 Like   #14
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QuoteOriginally posted by rawr Quote
Rather than spend big on an expensive full frame camera just for sometime video, get a cheap Panasonic G7 or G85 body with their kit lens and a few adapters for your lenses.
That does limit the usefulness of the Pentax lenses on an adapter since their field of view will be very narrow. (2:1 crop from FF)
02-01-2019, 01:14 PM   #15
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QuoteOriginally posted by rawr Quote
Rather than spend big on an expensive full frame camera just for sometime video, get a cheap Panasonic G7 or G85 body with their kit lens and a few adapters for your lenses.
Been there, done that - already own a Panasonic Gx85 and some nice M 4/3 lenses.

Also, please don't assume that I only do video "sometimes". These days I'm working full-time on producing dozens of on-line tutorial videos. For these 4K videos, I use a Fuji x mirrorless camera.

Last edited by Fenwoodian; 02-01-2019 at 01:24 PM.
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