HD Pentax-DA AF Rear Converter 1.4x AW on FF


bforbes

Link Posted 29/09/2015 - 18:16
Would the 1.4x converter be compatible with the new full frame lenses on the FF body. Anyone know?
Barrie
Too Old To Die Young
.
Pentax K1 K5-IIS K-01 K20D A50/2 A50/1.7 DA10-17 DA18-250 DA18-135 DA18-55 DA300 DA40 DA50-135 DA50-200 DA55-300 DA70 F35-70 DFA150-450 FA20-35 FA100 FA135 FA35 FA28 FA43 FA50 FA77 K55/1.8 M135/3.5 M200/4 M28/3.5 M28/2.8 M40/2.8 Q 01 02 MX-1 I-10 Sigma 15 24 105 180 8-16 10-20 17-35 17-50/2.8 24-70 400/5.6MF Tamron 70-200/2.8 17/3.5MF 24/2.5MF 28/2.5MF 90/2.5MF


http://www.pentaxphotogallery.com/artists/barrieforbes

Mike-P

Link Posted 29/09/2015 - 18:19
I believe it is.
No equipment list here but thanks for taking an interest. My Flickr

Helpful

50mpCMOS

Link Posted 29/09/2015 - 22:22
Yes that one teleconverter will work with full-frame Pentax lenses to the eventual Pentax full-frame body, but also strongly noting the rather limited range of existing Pentax full-frame glass. That range of full-frame glass working with the full-frame body will still keep all of the highest resolution sensor settings.

Yet, if it is outside of that range of lenses (say a nearly identical Sigma full-frame 24-70 f2.8 ) it is unknown if one will be able to use full frame sensor settings with such lenses.

Still, even with a full-frame body and aspc non full-frame lenses, the sensor and mp count will still be high enough for most users and most subjects - it will just be one of the most expensive (switched out) non-full-frame image capturing devices on the market if used in that manner.

Now if there would only be a set of Pentax full-frame extension tubes
Last Edited by 50mpCMOS on 29/09/2015 - 22:23

bforbes

Link Posted 29/09/2015 - 22:31
50mpCMOS wrote:
Yes that one teleconverter will work with full-frame Pentax lenses to the eventual Pentax full-frame body, but also strongly noting the rather limited range of existing Pentax full-frame glass. That range of full-frame glass working with the full-frame body will still keep all of the highest resolution sensor settings.

Yet, if it is outside of that range of lenses (say a nearly identical Sigma full-frame 24-70 f2.8 ) it is unknown if one will be able to use full frame sensor settings with such lenses.

Still, even with a full-frame body and aspc non full-frame lenses, the sensor and mp count will still be high enough for most users and most subjects - it will just be one of the most expensive (switched out) non-full-frame image capturing devices on the market if used in that manner.

Now if there would only be a set of Pentax full-frame extension tubes

The "yes" would have done
Barrie
Too Old To Die Young
.
Pentax K1 K5-IIS K-01 K20D A50/2 A50/1.7 DA10-17 DA18-250 DA18-135 DA18-55 DA300 DA40 DA50-135 DA50-200 DA55-300 DA70 F35-70 DFA150-450 FA20-35 FA100 FA135 FA35 FA28 FA43 FA50 FA77 K55/1.8 M135/3.5 M200/4 M28/3.5 M28/2.8 M40/2.8 Q 01 02 MX-1 I-10 Sigma 15 24 105 180 8-16 10-20 17-35 17-50/2.8 24-70 400/5.6MF Tamron 70-200/2.8 17/3.5MF 24/2.5MF 28/2.5MF 90/2.5MF


http://www.pentaxphotogallery.com/artists/barrieforbes

Irek

Link Posted 30/09/2015 - 13:56
HD Pentax-DA AF Rear Converter 1.4x AW unfortunately not cover a full frame.
Pentax ME-F, MZ-3, K-1
Pentax D-FA 24-70mm F2.8, FA 31mm F1.8 Ltd, FA 43mm F1.9 Ltd, FA 77mm F1.8 Ltd, Sigma 100-300 F4 + TC 1.4x, AF 540 FGZ
Hitech-Formatt 10% off all filters code - CIEJ10

McGregNi

Link Posted 30/09/2015 - 14:27
That could produce an interesting effect then ... Only the central aps-c part of the FF image would be magnified . But then suddenly the outer parts would be so much further away ! Like two focal lengths, one inside the other ..... ?
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver

Irek

Link Posted 30/09/2015 - 14:37
Best will be a adapter af f x1.7.
DA AF produce vignette on 35mm film
My friend test it and before weekend I can show samples.
Pentax ME-F, MZ-3, K-1
Pentax D-FA 24-70mm F2.8, FA 31mm F1.8 Ltd, FA 43mm F1.9 Ltd, FA 77mm F1.8 Ltd, Sigma 100-300 F4 + TC 1.4x, AF 540 FGZ
Hitech-Formatt 10% off all filters code - CIEJ10

doingthebobs

Link Posted 30/09/2015 - 23:36
The
Irek wrote:
HD Pentax-DA AF Rear Converter 1.4x AW unfortunately not cover a full frame.

My HD Pentax-DA AF Rear Converter 1.4x AW does not vignette the KA 50mm f1.7 on my Super A, just tried it.
It is full frame on 35mm so will work on the full frame camera, when it arrives. It works with Screw drive and SDM/DC focusing lenses, by passing on the focus signals to the lens from the camera. It can't be used with the following as mechanical damage may occur, but in reality you are unlikely to want to use it with these.
smc/HD Pentax-DA 15mm F4 ED AL Limited
smc/HD Pentax-DA 21mm F3.2 AL Limited
smc Pentax-DA 40mm F2.8 XS
The other Pentax site lists it as full frame compatible, if you don't believe me.

The adapter af f x1.7 covers 35mm full frame but it does not pass through the screw drive focus as it was made as an adapter to allow manual focus lenses to be focused by the adapter.
It does not connect the SDM/DC signals at all so treats these as manual focus lenses.
When using it, you get the manual focus somewhere close and then the adapter focuses the lens correctly.
Bob
Last Edited by doingthebobs on 30/09/2015 - 23:37

johnha

Link Posted 01/10/2015 - 01:49
50mpCMOS wrote:
Now if there would only be a set of Pentax full-frame extension tubes

Next you'll be wanting FF bellows as well
PPG Flickr

50mpCMOS

Link Posted 01/10/2015 - 02:01
Full-frame bellow would not be a bad idea

Novoflex makes bellows for current (and future) PK, although they are quite pricey.

petrochemist

Link Posted 01/10/2015 - 02:50
50mpCMOS wrote:
Full-frame bellow would not be a bad idea

Novoflex makes bellows for current (and future) PK, although they are quite pricey.

As I'm sure John knew, There's a large range of bellows usable on PK mount, I've got 3 different types, with different advantages costing under 50 per set used. A large range of replacement parts are available for the BPM model (including mounts for pretty much any SLR).
AFAIK none allow electronic communication between lens & camera, but all are fully FF compliant.

IIRC the Novoflex set allows lens tilt.
Mike
.
Pentax:K7, K100D, DA18-55, DA10-17, DA55-300, DA50-200, F100-300, F50, DA35 AL, 4* M50, 2* M135, Helicoid extension, Tak 300 f4 (& 6 film bodies)
3rd Party: Bigmos (Sigma 150-500mm OS HSM),2* 28mm, 100mm macro, 28-200 zoom, 35-80 zoom, 80-200 zoom, 80-210 zoom, 300mm M42, 600 mirror, 1000-4000 scope, 50mm M42, enlarger lenses, micro 4/3 cameras with various PK mounts, Zenit E...
Far to many tele-converters, adapters, project parts & extension tubes etc.

.[size=11:].Flickr WPF Panoramio

petrochemist

Link Posted 01/10/2015 - 03:09
I'd be surprised if it doesn't work fine with any FF lens, and I'd expect it to be acceptable with many crop lenses too. Most DA lenses cover sufficiently beyond the crop sensor that the expanded image should cover FF (The portion of image normally getting to a crop sensor would cover 93% of FF after the TC). The 1.7x should be OK with all DA lenses (1.7/1.5 crop = 1.13)

McGregNi wrote:
That could produce an interesting effect then ... Only the central aps-c part of the FF image would be magnified . But then suddenly the outer parts would be so much further away ! Like two focal lengths, one inside the other ..... ?

No that's just plain wrong. I suppose it would be possible to build a TC that only enlarged the inner part of the image & passed the rest through unchanged. If that was done you'd have a significant zone getting both enlarged image & unaltered image (like a double exposure). In reality anything outside the enlarged portion will be blocked by the metal of the TC.
Mike
.
Pentax:K7, K100D, DA18-55, DA10-17, DA55-300, DA50-200, F100-300, F50, DA35 AL, 4* M50, 2* M135, Helicoid extension, Tak 300 f4 (& 6 film bodies)
3rd Party: Bigmos (Sigma 150-500mm OS HSM),2* 28mm, 100mm macro, 28-200 zoom, 35-80 zoom, 80-200 zoom, 80-210 zoom, 300mm M42, 600 mirror, 1000-4000 scope, 50mm M42, enlarger lenses, micro 4/3 cameras with various PK mounts, Zenit E...
Far to many tele-converters, adapters, project parts & extension tubes etc.

.[size=11:].Flickr WPF Panoramio

Irek

Link Posted 08/10/2015 - 23:17
Vignette with DA300/4

https://www.dropbox.com/s/f5vjhltmhl9sv25/2015-08-05-0045.jpg?dl=0

Vignette with fa 77 You can see in viewfinder.
Pentax ME-F, MZ-3, K-1
Pentax D-FA 24-70mm F2.8, FA 31mm F1.8 Ltd, FA 43mm F1.9 Ltd, FA 77mm F1.8 Ltd, Sigma 100-300 F4 + TC 1.4x, AF 540 FGZ
Hitech-Formatt 10% off all filters code - CIEJ10

bforbes

Link Posted 09/10/2015 - 10:02
Thank you all.
Barrie
Too Old To Die Young
.
Pentax K1 K5-IIS K-01 K20D A50/2 A50/1.7 DA10-17 DA18-250 DA18-135 DA18-55 DA300 DA40 DA50-135 DA50-200 DA55-300 DA70 F35-70 DFA150-450 FA20-35 FA100 FA135 FA35 FA28 FA43 FA50 FA77 K55/1.8 M135/3.5 M200/4 M28/3.5 M28/2.8 M40/2.8 Q 01 02 MX-1 I-10 Sigma 15 24 105 180 8-16 10-20 17-35 17-50/2.8 24-70 400/5.6MF Tamron 70-200/2.8 17/3.5MF 24/2.5MF 28/2.5MF 90/2.5MF


http://www.pentaxphotogallery.com/artists/barrieforbes

Dwiea

Link Posted 06/01/2016 - 16:30
Sorry if this is a repeat. I phoned SRS today to ask them exactly this question. I was told after a long wait for then to speak to a pentax Rep that:

Using ANY digital glass (DA) on the new FF body will force the camera into crop mode. Apparently the crop mode on the dial is only so you can 'zoom in' with FF glass. I am so disappointed with this I waited this long for FF now they go and mess it up.
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