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09-16-2008, 02:10 PM   #1
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K20Dsq > square format & 20mp

I want one.

21.5 mm square sensor...resolution would whup APS: 20mp.

DA lenses would easily cover 21.5sq.

Square prints are the ideal for some images, as good or better than 2X3.

One big reason art directors/designers preferred 6X6 over 2X3 was because they commonly cropped 35mm severely...eg 2X3 often became 2X1.5 (horizontal shot cropped vertical)

There's lots of of space in the mirror box but it might have to be vertically deepened to accommodate the bigger mirror. A bigger prism would be necessary.

Seems waaay more logical for Pentax than full frame: 1) the DA lenses exist (no need to revive FA) 2) no competition at all 3) Nikon/Canon shooters would want one for the fun of it.


Last edited by janosh; 09-16-2008 at 02:33 PM.
09-16-2008, 08:35 PM   #2
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Had a 6x6 Yashicamat once. Never enjoyed the square format. Biggest reason for square was album covers. They are about gone. People don't like square prints or enlargements. Hassy even had to bring out 6x4.5 film holders. They were still losing ground to cameras that were rectangle to start with. May as well do a circle and use the full image circle.
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barondla

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09-17-2008, 10:43 AM   #3
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[QUOTE=barondla;344455] Biggest reason for square was album covers.

Wrong ....most album covers were shot 35mm of course..biggest commercial reason for 6X6 was weddings/portraits, followed by studio illustration and fashion (Richard Avedon).

"People don't like square prints or enlargements."

People who can't make their own prints are in trouble with 6X6, but if they can't make their own prints they aren't real photographers...are they?

"Hassy even had to bring out 6x4.5 film holders. They were still losing ground to cameras that were rectangle to start with."

645 was the name of the game in the disco/leisure-suit era. It was a financial compromise, killed off several DSLR generations ago

Hass is still with us in Medium Format, and Bronica and Fuji aren't... Mamiya is struggling to survive (who would go into business debt for a mere Mamiya when if they were successful photographers they could as easily have Sinar or Hass?)...

Janosh...
09-17-2008, 02:53 PM   #4
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As far as I can remember (I might be wrong, it's quite a while back), the 4.5 X 6 format came with Mamiya wanting to go large format without playing in Hasselblad and Rollei's turf. In the '70s, they were mainly advertising for 35mm users wanting to go larger without paying the price of Hasselblad et al. Their major selling point was three times the surface of 24 x 36 without having three times the bulk. Shortly after (if my memory serves me well)Bronica and Pentax got in the bandwagon. Then a few more...

09-17-2008, 05:47 PM   #5
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Have never seen A Hassy digital camera, but don't think its a square chip in that back! All medium format cameras (including Hassy) are struggling to survive.

thanks
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09-17-2008, 06:56 PM   #6
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QuoteOriginally posted by janosh Quote
I want one.

21.5 mm square sensor...resolution would whup APS: 20mp.

DA lenses would easily cover 21.5sq.

Square prints are the ideal for some images, as good or better than 2X3.

One big reason art directors/designers preferred 6X6 over 2X3 was because they commonly cropped 35mm severely...eg 2X3 often became 2X1.5 (horizontal shot cropped vertical)

There's lots of of space in the mirror box but it might have to be vertically deepened to accommodate the bigger mirror. A bigger prism would be necessary.

Seems waaay more logical for Pentax than full frame: 1) the DA lenses exist (no need to revive FA) 2) no competition at all 3) Nikon/Canon shooters would want one for the fun of it.
If you want this forget it! anyone who goes to this size would just as simply go for full frame. there is no real difference between 21.5 and 24 mm in height.

Additionally if you do the math, the present 16 x 24mm frame is 19.5 mm diagonal, you have a larger image circle, and therefore may have vignetting at the edges using an ASP-C sensor designed lens.

This is really impractical in my view, and would make no sense at all.
09-18-2008, 04:01 AM   #7
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QuoteOriginally posted by barondla Quote
Have never seen A Hassy digital camera, but don't think its a square chip in that back! All medium format cameras (including Hassy) are struggling to survive.

thanks
barondla

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A new Hasselblad digital medium fromat is selling for about 16,000. So someone must want one somewhere
09-18-2008, 05:06 AM   #8
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QuoteOriginally posted by flyer Quote
As far as I can remember (I might be wrong, it's quite a while back), the 4.5 X 6 format came with Mamiya wanting to go large format without playing in Hasselblad and Rollei's turf.
Bzzzzt.
Mamiya were making 6x6 cameras of various types from the 1940s.
Their press cameras were from the 1960s.
TLRs ran from 1950s to 1980s.
The 6x7 RB67 started in 1970
Mamiya were competing all right, and very successfully too.

09-18-2008, 09:16 AM   #9
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barondla,
The original reason for the square format was because a 6x6 waist level camera didn't lend itself to rotating 90 degrees for verical shots with a waist level finder. With the 6x6 the photographer would decide the desired format (portrait or landscape) in the darkroom. The 6x7 rectangle format came along with the Pentax 67 SLR and the Mamiya RB67 with a rotating back which solved the waist level problem. The 6x4.5 format came out in the seventies, along with the use of eye level finders. This also allow for smaller, ligher models. I still have all of my Mamiya TLR kit, but it hasn't seen much use lately.

Dave

QuoteOriginally posted by barondla Quote
Had a 6x6 Yashicamat once. Never enjoyed the square format. Biggest reason for square was album covers. They are about gone. People don't like square prints or enlargements. Hassy even had to bring out 6x4.5 film holders. They were still losing ground to cameras that were rectangle to start with. May as well do a circle and use the full image circle.
thanks
barondla

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09-18-2008, 09:24 AM   #10
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janosh,
You could buy a current full frame DSLR and draw vertical lines on either side of the focusing screen to creat your square format. It would have your desired resolution, plus the advantage of extra area with full frame lenses. The DA/DX lenses would cover the square format OK. It would also be great for fisheye shots!

Dave

QuoteOriginally posted by janosh Quote
I want one.

21.5 mm square sensor...resolution would whup APS: 20mp.

DA lenses would easily cover 21.5sq.

Square prints are the ideal for some images, as good or better than 2X3.

One big reason art directors/designers preferred 6X6 over 2X3 was because they commonly cropped 35mm severely...eg 2X3 often became 2X1.5 (horizontal shot cropped vertical)

There's lots of of space in the mirror box but it might have to be vertically deepened to accommodate the bigger mirror. A bigger prism would be necessary.

Seems waaay more logical for Pentax than full frame: 1) the DA lenses exist (no need to revive FA) 2) no competition at all 3) Nikon/Canon shooters would want one for the fun of it.
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