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04-08-2011, 10:17 PM   #16
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QuoteOriginally posted by harklee Quote
Thanks for the comments,

@Erick,

Of course it will be good to compare with the other digital medium formats. I will be happy to do that review when I get the money to buy all of those things. Pentax 645d is designed for landscape shooters, and for those who care about the print quality, 50MP is never enough. Why do you think people still use 8X10 view cameras?
because a 8x10 camera = 8x10 sensor
did you read the review on the H4D 50mp on diglloyd - Blog ? specially for landscape photography one need f/16


Last edited by erick; 04-08-2011 at 11:43 PM.
04-08-2011, 11:41 PM   #17
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QuoteOriginally posted by erick Quote
Why do you think people still use 8X10 view cameras?
I use 8X10 format and I can attest that although current 80Mp digital medium format back can come close to providing the same level of detail rendering the sensor on those MF back is significantly smaller than that of an 8X10 camera therefore the final image will be rendered quite differently.
04-08-2011, 11:44 PM   #18
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QuoteOriginally posted by Digitalis Quote
I use 8X10 format and I can attest that although current 80Mp digital medium format back can come close to providing the same level of detail rendering the sensor on those MF back is significantly smaller than that of an 8X10 camera therefore the final image will be rendered quite differently.
and a lot of diffraction it seems that MF is fashion oriented (lenses wide open)

I'd like to be able to use f/22 on MF
04-08-2011, 11:52 PM   #19
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QuoteOriginally posted by erick Quote
and a lot of diffraction it seems that MF is fashion oriented (lenses wide open)

I'd like to be able to use f/22 on MF
On 8X10 f22 is typically the working aperture for many common lenses for that format, however f22 gives equivalent DOF to f/8~f/11 on 645. To get the equivalent DOF as f/16 on 24X36mm film, on 8X10 you have to use f/64 - and live with the diffraction. Diffraction is something we are going to have to live with, Until we have access to superlenses.

04-09-2011, 12:00 AM   #20
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QuoteOriginally posted by Digitalis Quote
On 8X10 f22 is typically the working aperture for many common lenses for that format, however f22 gives equivalent DOF to f/8~f/11 on 645. To get the equivalent DOF as f/16 on 24X36mm film, on 8X10 you have to use f/64 - and live with the diffraction. Diffraction is something we are going to have to live with, Until we have access to superlenses.
not only superlenses, with very small pixels diffraction appears at f/8 or f/11
there is no needs for many photographers to get 80 mp
04-09-2011, 12:44 AM   #21
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Amazing stuff.
04-09-2011, 12:56 AM   #22
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Wow, simply amazing photos. I had to clean up the drool off my keyboard.
04-09-2011, 01:03 AM   #23
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Sorry I have not commented the photos
very good work

04-09-2011, 03:08 AM - 1 Like   #24
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I have the 645 135mm LS and it works perfectly with the 645D. When the lens is mounted, the top LCD displays "LS".

Page 27 of the English 645D manual describes the use of LS lenses.
04-09-2011, 04:07 AM   #25
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It's one of the best serie of photos I've ever seen....!!!!!!!!!!!
04-09-2011, 05:22 AM   #26
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QuoteOriginally posted by Thomas Quote
I have the 645 135mm LS and it works perfectly with the 645D. When the lens is mounted, the top LCD displays "LS".
thank you, that is precisely the information I needed.
04-09-2011, 05:46 AM   #27
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I believe everything that you have said about the 645D, cause you have the goods to prove it

Fantastic photos, takes my breath away.....
04-09-2011, 11:22 AM   #28
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QuoteOriginally posted by Digitalis Quote
in the studio I suspect the leica with it's leaf shutter* and wider aperture lenses would be a more compelling choice
...
*I am aware pentax makes a 75mm f/2.8 and 135mm f/4 leaf shutter lenses but everyone I know seems to be in the dark about their functionality with the 645D. The consensus is that they do not work, though personally I cannot see why they wouldn't work.
Not sure why it's so important to have LS in the studio since you can control the lighting. I'd find it useful outdoors when you do the "overpower the sun" trick, but that's mainly it IMHO.

And the Pentax LS lenses do work on the 645D...confirmed by a few people already...
04-09-2011, 04:44 PM   #29
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Thanks Harklee, great photos and review, very appreciated.

I would be interested in what you think (if you have tested it) what has been a maximum acceptable exposure time for iso100 or other iso's
04-09-2011, 06:05 PM   #30
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QuoteOriginally posted by kenyee Quote
I'd find it useful outdoors when you do the "overpower the sun" trick, but that's mainly it
that's the idea kenyee, I do a fair bit of strobist portraiture work so the 1/500th synch speed is something that even my canon and nikon DSLR cameras cannot achieve without using HSS - and it also means I don't have to live with reduced output from the flash units because of HSS
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