Post your medium format photos!

**Ed Hurst** · 12-19-2019, 03:58 AM

Identical twins, perhaps...? ;-)

Timotis77 · 12-19-2019, 04:15 AM - **4 Likes**

Pentax 645z - FA 200mm f/4 - I got this lens for $180 AU ...........What a absolute bargin

dastar · 12-19-2019, 06:33 AM - **5 Likes**

lesmore49 · 12-20-2019, 12:40 AM

Originally posted by LaHo

P645N film images of some classic cars:

Volvo 544 PV

Buick Electra Convertible

Chevy Impala 327

Camera: Pentax 645N
Lens: smc Pentax-A 645 35mm f:3.5 (yellow filter)
Exposure: 1/90-125 @ F/5.6
Film: Kosmo Foto Mono home dev. in Rodinal (APH-09) 1+49

'
Nice to see two cars on your photo selection, that were similar to a couple that my family had.

I had a '62 Volvo PV544s and my father had a '69 Chevy Impala with the 396 cubic inch V8... 'Rat motor' ....as we used to call this big block Chevy engine series in North America.

Nice shots.

Lord Lucan · 12-20-2019, 12:39 PM

Originally posted by Ed Hurst

Most of that railway now forms part of the Northern Line on the London Underground system and still sees heavy use every day.

I have used Clapham Common Station quite a bit in the past and always felt a bit of vertigo-like queasiness on that narrow platform.

Re: the combination of images to get two trains, the line is extremely busy, busier than ever, so it might have been quicker to have waited for two trains to have been present in reality

Pentaxrookie · 12-21-2019, 11:39 AM - **5 Likes**

Hi everybody,
since I got my Z two weeks ago, I thought I post my recent work with the DFA 55 mm.
Merry Christmas & enjoy.

Apfel-Stielleben - Apple Still Life - Merry Christmas. | Flickr

P.S. Somehow the embedded image link to flickr is not working.

**kaseki** · 12-22-2019, 05:52 AM

Originally posted by Pentaxrookie

Hi everybody,
since I got my Z two weeks ago, I thought I post my recent work with the DFA 55 mm.
Merry Christmas & enjoy.
...

Nice lighting concept.

Pentaxrookie · 12-22-2019, 12:44 PM

Originally posted by kaseki

Nice lighting concept.

Thanks.

**TDvN57** · 12-22-2019, 11:54 PM

Originally posted by Pentaxrookie

Hi everybody,
since I got my Z two weeks ago, I thought I post my recent work with the DFA 55 mm.
Merry Christmas & enjoy.

Apfel-Stielleben - Apple Still Life - Merry Christmas. | Flickr

P.S. Somehow the embedded image link to flickr is not working.

Great picture. I like the dramatic lighting and composition. Rookie? No way :-)

Pentaxrookie · 12-23-2019, 08:08 AM

Originally posted by TDvN57

Great picture. I like the dramatic lighting and composition. Rookie? No way :-)

Thanks. I guess, I can now sell my Fuji gear and look for a new name. 😀

**ivanvernon** · 12-23-2019, 09:39 AM - **2 Likes**

Here are a few shots from frozen Ohio with one of my favorite camera-lens combinations.

kain · 12-23-2019, 05:29 PM

Originally posted by ivanvernon

Here are a few shots from frozen Ohio with one of my favorite camera-lens combinations.

Lovely fall pictures. Is the SR worth it on the 90?

**ivanvernon** · 12-23-2019, 07:50 PM

Originally posted by kain

Lovely fall pictures. Is the SR worth it on the 90?

Yes, I believe it is. I am not a big tripod user, and the 90mm lets me hand hold the Z at 1/60 sec with no problems, meaning that for landscape use I can go to smaller apertures than otherwise. It seems to me that the SR is giving me about two stops.

**kaseki** · 12-24-2019, 10:45 AM - **1 Like**

Originally posted by ivanvernon

Yes, I believe it is. I am not a big tripod user, and the 90mm lets me hand hold the Z at 1/60 sec with no problems, meaning that for landscape use I can go to smaller apertures than otherwise. It seems to me that the SR is giving me about two stops.

Rather than embedding motion stabilization (MS) into every lens, Pentax should consider providing an MS device performing the function that was once provided by the Dynalens product, manufactured by Dynasciences Corp. (back in the '70s). This device would fit to the front of the lens assembly. It would have to have an aperture equal to that of the lens being stabilized plus enough extra for the beam width, which would make it practical where it was most needed, long telephotos of modest f/#. One device could potentially stabilize a range of lenses.

The Dynalens comprised a pair of flat windows with an index-matched liquid in between them within a bellows, along with servo motors, rate sensors and drive electronics. When one window was dynamically tilted, a prism was effected, deviating the beam. Chromatic aberration would have to be addressed, but in our case, the motion being corrected would be so small that this might not be significant. How the scheme would compare to a common alternative scheme of counter rotating acromatic prisms in cost and performance is unclear to me.

I assume modern comparable devices exist for television work, but have no idea what their designs and limitations are.

**ivanvernon** · 12-24-2019, 12:39 PM

Originally posted by kaseki

Rather than embedding motion stabilization (MS) into every lens, Pentax should consider providing an MS device performing the function that was once provided by the Dynalens product, manufactured by Dynasciences Corp. (back in the '70s). This device would fit to the front of the lens assembly. It would have to have an aperture equal to that of the lens being stabilized plus enough extra for the beam width, which would make it practical where it was most needed, long telephotos of modest f/#. One device could potentially stabilize a range of lenses.

The Dynalens comprised a pair of flat windows with an index-matched liquid in between them within a bellows, along with servo motors, rate sensors and drive electronics. When one window was dynamically tilted, a prism was effected, deviating the beam. Chromatic aberration would have to be addressed, but in our case, the motion being corrected would be so small that this might not be significant. How the scheme would compare to a common alternative scheme of counter rotating acromatic prisms in cost and performance is unclear to me.

I assume modern comparable devices exist for television work, but have no idea what their designs and limitations are.

You are way past me technologically, and I really comment about the cost and technical/engineering that govern this aspect of product development. The 90mm SR works for me, however.

12-19-2019, 06:33 AM - 5 Likes	#13953
dastar Junior Member Join Date: Aug 2019 Posts: 25	645z 55mmf2.8 Last edited by dastar; 12-21-2019 at 04:30 AM.

12-21-2019, 11:39 AM - 5 Likes	#13956
Pentaxrookie Senior Member Join Date: Feb 2018 Location: 48282 Emsdetten Posts: 113	Hi everybody, since I got my Z two weeks ago, I thought I post my recent work with the DFA 55 mm. Merry Christmas & enjoy. Apfel-Stielleben - Apple Still Life - Merry Christmas. \| Flickr P.S. Somehow the embedded image link to flickr is not working. Attached Images Last edited by Pentaxrookie; 12-21-2019 at 11:51 AM. Reason: Flickr link

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12-19-2019, 03:58 AM	#13951
Ed Hurst Site Supporter Join Date: May 2010 Location: Sydney Posts: 1,657	Identical twins, perhaps...? ;-)

12-19-2019, 04:15 AM - 4 Likes	#13952
Timotis77 Forum Member Join Date: Dec 2018 Location: Melbourne Photos: Gallery Posts: 84	Pentax 645z - FA 200mm f/4 - I got this lens for $180 AU ...........What a absolute bargin

12-20-2019, 12:40 AM	#13954
lesmore49 Pentaxian Join Date: Nov 2007 Location: Western Canada Posts: 12,342	Originally posted by LaHo P645N film images of some classic cars: Volvo 544 PV Buick Electra Convertible Chevy Impala 327 Camera: Pentax 645N Lens: smc Pentax-A 645 35mm f:3.5 (yellow filter) Exposure: 1/90-125 @ F/5.6 Film: Kosmo Foto Mono home dev. in Rodinal (APH-09) 1+49 ' Nice to see two cars on your photo selection, that were similar to a couple that my family had. I had a '62 Volvo PV544s and my father had a '69 Chevy Impala with the 396 cubic inch V8... 'Rat motor' ....as we used to call this big block Chevy engine series in North America. Nice shots.

12-20-2019, 12:39 PM	#13955
Lord Lucan Pentaxian Join Date: Sep 2017 Location: South Wales Photos: Gallery Posts: 2,961	Originally posted by Ed Hurst Most of that railway now forms part of the Northern Line on the London Underground system and still sees heavy use every day. I have used Clapham Common Station quite a bit in the past and always felt a bit of vertigo-like queasiness on that narrow platform. Re: the combination of images to get two trains, the line is extremely busy, busier than ever, so it might have been quicker to have waited for two trains to have been present in reality

12-22-2019, 05:52 AM	#13957
kaseki Loyal Site Supporter Join Date: Dec 2017 Photos: Gallery \| Albums Posts: 1,138	Originally posted by Pentaxrookie Hi everybody, since I got my Z two weeks ago, I thought I post my recent work with the DFA 55 mm. Merry Christmas & enjoy. ... Nice lighting concept.

12-22-2019, 12:44 PM	#13958
Pentaxrookie Senior Member Join Date: Feb 2018 Location: 48282 Emsdetten Posts: 113	Originally posted by kaseki Nice lighting concept. Thanks.

12-22-2019, 11:54 PM	#13959
TDvN57 Loyal Site Supporter Join Date: Jul 2011 Location: Berlin Photos: Gallery Posts: 1,149	Originally posted by Pentaxrookie Hi everybody, since I got my Z two weeks ago, I thought I post my recent work with the DFA 55 mm. Merry Christmas & enjoy. Apfel-Stielleben - Apple Still Life - Merry Christmas. \| Flickr P.S. Somehow the embedded image link to flickr is not working. Great picture. I like the dramatic lighting and composition. Rookie? No way :-)

12-23-2019, 08:08 AM	#13960
Pentaxrookie Senior Member Join Date: Feb 2018 Location: 48282 Emsdetten Posts: 113	Originally posted by TDvN57 Great picture. I like the dramatic lighting and composition. Rookie? No way :-) Thanks. I guess, I can now sell my Fuji gear and look for a new name. 😀

12-23-2019, 05:29 PM	#13962
kain Senior Member Join Date: Dec 2012 Photos: Gallery Posts: 162	Originally posted by ivanvernon Here are a few shots from frozen Ohio with one of my favorite camera-lens combinations. Lovely fall pictures. Is the SR worth it on the 90?

12-23-2019, 07:50 PM	#13963
ivanvernon Loyal Site Supporter Join Date: Oct 2012 Location: Medina, OH Photos: Albums Posts: 7,224	Originally posted by kain Lovely fall pictures. Is the SR worth it on the 90? Yes, I believe it is. I am not a big tripod user, and the 90mm lets me hand hold the Z at 1/60 sec with no problems, meaning that for landscape use I can go to smaller apertures than otherwise. It seems to me that the SR is giving me about two stops.

12-24-2019, 10:45 AM - 1 Like	#13964
kaseki Loyal Site Supporter Join Date: Dec 2017 Photos: Gallery \| Albums Posts: 1,138	Originally posted by ivanvernon Yes, I believe it is. I am not a big tripod user, and the 90mm lets me hand hold the Z at 1/60 sec with no problems, meaning that for landscape use I can go to smaller apertures than otherwise. It seems to me that the SR is giving me about two stops. Rather than embedding motion stabilization (MS) into every lens, Pentax should consider providing an MS device performing the function that was once provided by the Dynalens product, manufactured by Dynasciences Corp. (back in the '70s). This device would fit to the front of the lens assembly. It would have to have an aperture equal to that of the lens being stabilized plus enough extra for the beam width, which would make it practical where it was most needed, long telephotos of modest f/#. One device could potentially stabilize a range of lenses. The Dynalens comprised a pair of flat windows with an index-matched liquid in between them within a bellows, along with servo motors, rate sensors and drive electronics. When one window was dynamically tilted, a prism was effected, deviating the beam. Chromatic aberration would have to be addressed, but in our case, the motion being corrected would be so small that this might not be significant. How the scheme would compare to a common alternative scheme of counter rotating acromatic prisms in cost and performance is unclear to me. I assume modern comparable devices exist for television work, but have no idea what their designs and limitations are.

12-24-2019, 12:39 PM	#13965
ivanvernon Loyal Site Supporter Join Date: Oct 2012 Location: Medina, OH Photos: Albums Posts: 7,224	Originally posted by kaseki Rather than embedding motion stabilization (MS) into every lens, Pentax should consider providing an MS device performing the function that was once provided by the Dynalens product, manufactured by Dynasciences Corp. (back in the '70s). This device would fit to the front of the lens assembly. It would have to have an aperture equal to that of the lens being stabilized plus enough extra for the beam width, which would make it practical where it was most needed, long telephotos of modest f/#. One device could potentially stabilize a range of lenses. The Dynalens comprised a pair of flat windows with an index-matched liquid in between them within a bellows, along with servo motors, rate sensors and drive electronics. When one window was dynamically tilted, a prism was effected, deviating the beam. Chromatic aberration would have to be addressed, but in our case, the motion being corrected would be so small that this might not be significant. How the scheme would compare to a common alternative scheme of counter rotating acromatic prisms in cost and performance is unclear to me. I assume modern comparable devices exist for television work, but have no idea what their designs and limitations are. You are way past me technologically, and I really comment about the cost and technical/engineering that govern this aspect of product development. The 90mm SR works for me, however.