Forum: Pentax Medium Format
01-31-2011, 01:19 PM
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Forum: Pentax Medium Format
12-27-2010, 04:44 PM
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Thanks fs999, Tuco and lbenac. Luc: the pictures are 13-15 years old, now I use the Canon EOS 1DsII and the 7D+ 500mm f4 L IS for fauna photography. When I have the funds I will shot again the 600mm with the Pentax 645D. For now, I can use all my Pentax 645 lenses on my Canon cameras with the Mirex tilt and shift adapter.
Two more pictures with the 645n and the 600mm f5.6:
Pirineos, Spain, Fuji Provia 100 Attachment 79114
Extremadura, Spain, Fuji Provia 100 Attachment 79115
Ramón
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Forum: Pentax Medium Format
12-27-2010, 04:20 AM
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You're welcome. I'm also interested in this kind of adapter. There exist the Zörk (Zoerk) Pro Shift Adapter, ProSA-P67, for Pentax 645 camera-P67 lenses but only with shift (20mm) and no tilt. I think it is no longer being made and the last price I see was 900 US$. Zörk Pro Shift adapter
Ramón
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Forum: Pentax Medium Format
12-26-2010, 03:21 PM
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Some pictures with the Pentax 645n and the 600mm f5.6 ED-IF:
Pinacate, Sonora, Mexico, Fuji Velvia 50 Attachment 79034
Arizona, USA, Fuji Provia 100 Attachment 79035
Arizona, USA, Fuji Provia 100 Attachment 79036
Gallocanta, Aragon, Spain, Fuji Provia 100 Attachment 79037
Extremadura, Spain, Fuji Provia 100 Attachment 79038
Ramón
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Forum: Pentax Medium Format
12-26-2010, 02:24 PM
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Forum: Pentax Medium Format
12-26-2010, 12:18 PM
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Forum: Pentax Medium Format
12-22-2010, 05:18 PM
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1. and 2. Maybe you don't have seen my 645D "equivalent" lenses table. I have posted the table here (april 2010) and in this thread. https://www.pentaxforums.com/forums/attachment.php?attachmentid=78820&d=1293059317
As you can see there is a 35mmFF "equivalent" focal length for the horizontal, vertical and diagonal ratio.
Note also that I say in my post "same" "equivalent" (not same and equivalent) and "MORE OR LESS".
"Personnaly, I gave up on making knowledgable calculations of equivalence etc... What is important is knowing what you can get from your equipment and knowing what equipement your need for the result you want to achieve."
I agree. Because that I have used on film these formats:
35mm (Canon, Olympus)
35mm panoramic (Noblex)
4.5x6cm (Fuji and Pentax)
6x6 (Rolleiflex)
6x7 (Mamiya)
6x9 (Cambo)
5x12 panoramic (Noblex)
9x12 and 4x5" (Linhof, Arca-Swiss)
13x18 (Arca-Swiss)
8x10" (Arca-Swiss)
Now, on digital, I use 3 formats:
4/3 Olympus
APS-C Canon
35FF Canon
And Maybe 33x44mm Pentax in the near future...
"and knowing what equipement your need for the result you want to achieve."
One example:
Linhof Technika V, Nikkor T-ED 500/11, Sinar panorama 6x12 back, Fuji Velvia: Luna sobre Aneto-Maladeta :: Fotonatura.org
Ramón
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Forum: Pentax Medium Format
12-21-2010, 11:36 AM
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Digitalis, think about how big the front element of an 117mm/f1.1 lens will be. It is very evident, even without maths that the hipothetic 117mm/f1.1 on a 35FF camera is not "equivalent" (DOF) at the 150mm/f2.8 lens on the 645 or the 645D.
If you want to make the "same" photo (equivalent FOV and DOF) with the 645D and the 150/2.8 and a 35mmFF camera (the Canon 1DsII for example) you need this lens: 150mm/ crop factor 645D-35mmFF (1.27)= 118mm (more or less!) and the equivalent DOF: 2.8/crop factor (1.27)= 2.2
Sorry for my very poor english!
Ramón
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Forum: Pentax Medium Format
12-20-2010, 06:17 AM
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Forum: Pentax Medium Format
06-05-2010, 01:05 PM
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Forum: Pentax Medium Format
06-02-2010, 09:27 AM
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Forum: Pentax Medium Format
05-02-2010, 02:04 PM
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The crop factor (or focal length multiplier) 645/645D is 1.27
The "focal length multiplier" 35mm/645D is 0.78 (0.7867) (diagonal) as you can see in the table.
Ramón
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Forum: Pentax Medium Format
04-30-2010, 02:18 AM
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I can make some photos with the softbox this weekend.
Ramón
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Forum: Pentax Medium Format
04-29-2010, 09:36 AM
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The 1.4 is not bad, but I prefer to use the 300/4 and the 600/5.6 without it (note:I don't use my 645 system since 2003, waiting the 645D for the resurrection of my eight 645 lenses). I have the canon 500/4 L and use the 1.4 Canon 30-40% of the time.
Ramón
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Forum: Pentax Medium Format
04-29-2010, 09:20 AM
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Forum: Pentax Medium Format
04-29-2010, 07:13 AM
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Forum: Pentax Medium Format
04-29-2010, 06:20 AM
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In the Pentax Lens Reviews Database description of the Pentax 645 75mm LS says: "and the lens is not suited for the 645D" Why? you can't fire the leaf shutter?
Ramón
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Forum: Pentax Medium Format
04-26-2010, 03:35 PM
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Excellent lens and excellent price. The FA 150/2.8 price (new) is 1000 euros (more or less).
Ramón
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Forum: Pentax Medium Format
04-03-2010, 03:01 PM
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More opinions about the 33-55? any comparison-test against the FA 35?
Thanks,
Ramón
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Forum: Pentax Medium Format
03-28-2010, 01:26 PM
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