Luminous Landscape Forum

Equipment & Techniques => Medium Format / Film / Digital Backs – and Large Sensor Photography => Topic started by: gazwas on February 16, 2014, 01:21:59 pm

Title: Pentax 645DII and lens adapters.
Post by: gazwas on February 16, 2014, 01:21:59 pm
My only experience of Pentax cameras is the K1000 from my college days but if all the specs of the new camera come to fruition it sounds like one hell of a great camera for the price especially looking at the way overpriced competition.

However, is there such a thing as TS-E lens on the Pentax , adapters available to use the Canon TS-E lenses or is this this still the advantage of the Hasselblad and Phase backs on a tech camera?
Title: Re: Pentax 645DII and lens adapters.
Post by: uaiomex on February 16, 2014, 01:29:54 pm
You will need lenses from reflex 6X6 and up to be able to use with any 645 reflex body. The distance from sensor to mount must be longer than the lens at infinity in order to use the adapter which adds extra mm's. Otherwise you'd be always in macro mode focus. IHIH. Eduardo
Title: Re: Pentax 645DII and lens adapters.
Post by: yaya on February 16, 2014, 01:37:34 pm
I suppose you can use it on a view camera but not with WA lenses
Title: Re: Pentax 645DII and lens adapters.
Post by: gazwas on February 16, 2014, 05:45:13 pm
Thats a shame, would be a great camera if it was possible to use with some type of wide TS-E lens.
Title: Re: Pentax 645DII and lens adapters.
Post by: uaiomex on February 16, 2014, 09:27:35 pm
Pentax should follow Sony A7/R success coming with a mirrorless 645 body ASAP. Just as you can use a myriad of lenses on the A7 line because its super short distance sensor-lens flange, the same could be done with a mirrorless DMF body. Even fabulous TS-E lenses could be used with some (limited) movements.                  Eduardo.                                                                                                                                                          
Thats a shame, would be a great camera if it was possible to use with some type of wide TS-E lens.
Title: Re: Pentax 645DII and lens adapters.
Post by: gerald.d on February 17, 2014, 02:29:57 am
The problem with the Pentax 645 is that it has the longest flange focal distance of pretty much any camera with a 645 sensor or smaller -

http://en.wikipedia.org/wiki/Flange_focal_distance

Basically, no other lenses could be mounted to it and retain infinity focusing.
Title: Re: Pentax 645DII and lens adapters.
Post by: tsjanik on February 17, 2014, 03:18:30 pm
Thats a shame, would be a great camera if it was possible to use with some type of wide TS-E lens.

You can use Pentax 67 (or other ) lenses via a Zoerk adapter

http://www.zoerk.com/pages/p_pshift.htm
Title: Re: Pentax 645DII and lens adapters.
Post by: dag.bb on February 17, 2014, 07:42:14 pm
The problem with the Pentax 645 is that it has the longest flange focal distance of pretty much any camera with a 645 sensor or smaller -

http://en.wikipedia.org/wiki/Flange_focal_distance

Basically, no other lenses could be mounted to it and retain infinity focusing.
Indeed, no other 645 lenses are usable, but there are several adapters available for larger formats, including Pentax 6x7, Hasselblad 6x6, Rollei SL66, Pentacon 6x6 and Bronica GS-1 6x7. The easiest way to get tilt-shift, seems to be a Hartblei Super Rotator lens with P645 mount from ebay, reviewed here (http://www.luminous-landscape.com/reviews/lenses/hartblei45.shtml). An interesting solution would be the Schneider PCS Super-Angulon f/4.5 55mm for Pentacon six, however it seems hard to find. A complete overview can be found on pentaxforums. (http://www.pentaxforums.com/forums/48-pentax-645d-medium-format/182276-pentax-medium-format-third-party-resources-ii-t-s-lenses-tilt-shift-lenses.html)

(update)

It seems that it is possible to get the Schneider Super-Angulon modified to Hasselblad V-mount (or is it H-mount, not 100% sure) (http://www.ebay.com/itm/HASSELBLAD-55MM-PE-PCS-F4-5-SCHNEIDER-SUPER-ANGULON-/371005309018?pt=Camera_Lenses&hash=item5661a3c05a). So, for $2,795.00 + adapter, you might have it for P645 too... hmm!
Title: Re: Pentax 645DII and lens adapters.
Post by: gazwas on February 18, 2014, 04:08:48 am
Its all well and good all these advances in chip design but why does it take so long for the cameras to catch up.  :(

What I really want with this lovely new 50Mpix CMOS chip is a mirrorless camera so its nice and small like a Sony A7 on steroids, able to take lots of different lenses like the Alpa FPS (but without the stupid mounting cost) and do away with the unreliabble and costly camera/leaf shutters and replace with a global shutter (on chip?). Then we'd get improved reliability, less noise, shake and most importantly flash sync at all (800th/1600th would do) shutter speeds on any lens you stuck on it.

It it that hard..........  ??? (obviously yes or too costly)

I'm really hoping Canon are working on something like this (all be it with smaller sized chips) as much of this technology like global shutters and EVF's is straight from the video world, but no signs of anything ever being released. What a camera system that would be and a true game changer.