Long Pentax Lenses
Shooting the Welsh Wilderness with K-m, KX, MX, ME Super and assorted lenses.
All the 645 lenses I've tried have been excellent performers on their native platform so I'd think they should be just as good on a DSLR. Maybe a little on the heavy side though.
A friend of mine has quite an extensive 645 outfit, built up at a combined cost similar to what you'd pay for a single DA*300. I intend putting my bargain-hunting skills to use in assembling a similar 67 kit over the course of 2011
Gary
My PPG link
True, but to be fair a long lens for DSLRs isn't going to be cheap either.
Even Canon's 100-400 is £1300, which means about 2 grand in Pentax prices
Concert photography
Currently on a Pentax hiatus until an FF Pentax is released
So, what would I be looking for? Does the adapter gives me Aperture Automatic or even the full AF and f range?
What 645 lens would I be looking for for the long range? Is there a factor I would have to calculate in for the focal range. Does the aperture stays the same or does it changes?
Sorry for all those questions but this is the first time I heard about this idea and I like it but really need much more info.
Any help with this would be welcome!
SmutjeUK
It's nice to be nice!
Pentax K-5 with D-GB4 Grip, to many lenses to mention by now (serious LBA by now), TC's, Lowepro Slingshot 300 AW, Manfrotto 028 & Redsnapper RS-283 with various Heads plus various Camera Clamps (I collect them). Pentax AF 360FGZ, Pentax AF 240FT, several Metz 45 CT-1 & 5 with stands and 'Blow Up' Soft Boxes, Flash Triggers, and various Macro gear.
The pentax adapters are very expensive. I have bullied the far east adapter concerns to produce a similar adapter for Pentax. This is what I am using. I think it cost under £40.
Those who know these things tell me that the colours are very good but soft.
I now have the Pentax 300mm lens. When the weather changes will do a side by side test and maybe post the results.
This lens is hefty in comparison to the Pentax 300mm and does take a lot of handling to get sharp results. The mamiya 500 lens is even heftier but is is fun to try these things.
With better Camera IQ it's possible to get decent results enlarging part of the frame from a 300mm.
If you already have a 400mm there's little point in buying a 500mm because the 500mm FOV isn't a big jump from the 400mm and easily achieved by enlarging the 400mm frame.
Pentax K-1 + K-5 and some other stuff
Algi
I have been using both pentax and mamiya 300mm and 500mm medium format lens on the K5 with an adapter. I am pleased with the results.
The pentax adapters are very expensive. I have bullied the far east adapter concerns to produce a similar adapter for Pentax. This is what I am using. I think it cost under £40.
Those who know these things tell me that the colours are very good but soft.
I now have the Pentax 300mm lens. When the weather changes will do a side by side test and maybe post the results.
Where do you get the Pentax and Mamiya adaptors from?
Is the Mamiya bayonet the same as the Pentax or do you need a new adapter for each?
Are they fully manual?
Sorry for all those questions but I am really interested as I want to get a long range lens within the next 6 month or so.
It would be interesting to see a side by side comparison of those.
Many thanks for the information.
SmutjeUK
It's nice to be nice!
Pentax K-5 with D-GB4 Grip, to many lenses to mention by now (serious LBA by now), TC's, Lowepro Slingshot 300 AW, Manfrotto 028 & Redsnapper RS-283 with various Heads plus various Camera Clamps (I collect them). Pentax AF 360FGZ, Pentax AF 240FT, several Metz 45 CT-1 & 5 with stands and 'Blow Up' Soft Boxes, Flash Triggers, and various Macro gear.
Would the focal ratio different from the 645 when using a K-5? I do like the idea as I am really looking for a quality long lens but the F*250-600 is way out of my reach. I know there is the Bigma 150-500 but I rather would have something Pentax.
So, what would I be looking for? Does the adapter gives me Aperture Automatic or even the full AF and f range?
What 645 lens would I be looking for for the long range? Is there a factor I would have to calculate in for the focal range. Does the aperture stays the same or does it changes?
Sorry for all those questions but this is the first time I heard about this idea and I like it but really need much more info.
Any help with this would be welcome!
The 400mm f/4 lenses for the 645 system will still be 400mm f/4 lenses regardless of which camera you attach them to - nothing changes in that respect.
What does change are the features, the lenses will be fully manual on a K-5 just as if you were attaching an old K-mount or screw mount lens to your camera. No semi-auto modes (Av, Tv, P, etc) and no AF.
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24265 posts
22 years
Tyldesley,
Manchester
Has anyone tried a 645 lens with the 645 K adapter?