Round lens Square sensor

Shanti · 02-10-2015, 08:52 PM

What if the new FF has a square sensor?? anyone think the same. If the new teles cover more than FF (35mm) then that could be the reason. A square sensor that is cropped to what format is needed,also for pixel shifting maybe.The prism looks alot like an old 6x7 MF Pentax...
I do wonder.........

**PentaxJax** · 02-10-2015, 08:59 PM

Originally posted by Shanti

What if the new FF has a square sensor

I guess you would not need a grip then

tuco · 02-10-2015, 09:17 PM - **1 Like**

Originally posted by Shanti

...The prism looks alot like an old 6x7 MF Pentax...

Yes, it does look like the newer Pentax 67II. I realize the branding on Pentax's 6x7/67/67II may be confusing to the uninitiated but for those of us shooting them it's like saying your K5II looks like a K-01. So here is what my Pentax 67 looks like in the spirit of learning more about Pentax's legacy product line.

Shanti · 02-10-2015, 09:22 PM

yeah its the newer one I meant & used long ago ..thanks for the info

Blue · 02-10-2015, 09:25 PM

Originally posted by Shanti

What if the new FF has a square sensor?? anyone think the same. If the new teles cover more than FF (35mm) then that could be the reason. A square sensor that is cropped to what format is needed,also for pixel shifting maybe.The prism looks alot like an old 6x7 MF Pentax...
I do wonder.........

To be a true full frame 35mm sensor, the sensor would have to be 24x36, otherwise it would be another format.

Dr_who · 02-10-2015, 09:28 PM

Originally posted by Shanti

What if the new FF has a square sensor?? anyone think the same. If the new teles cover more than FF (35mm) then that could be the reason. A square sensor that is cropped to what format is needed,also for pixel shifting maybe.The prism looks alot like an old 6x7 MF Pentax...
I do wonder.........

It looks like dozens and dozens of Pentax 35 mm cameras that have prisms as well.

Paul the Sunman · 02-10-2015, 09:44 PM

Originally posted by Shanti

What if the new FF has a square sensor?? anyone think the same. If the new teles cover more than FF (35mm) then that could be the reason. A square sensor that is cropped to what format is needed,also for pixel shifting maybe.The prism looks alot like an old 6x7 MF Pentax...
I do wonder.........

The image circle for 36x24 FF has to have an image circle of at least 6√13 = 21.63mm radius for the corners to be covered. Existing lenses impose this constraint (ignoring hoods for the moment). A square sensor with the same radius image circle would have sides 6√26 = 30.59mm. Would you give up 5.41mm width for the extra 6.59mm height? A landscape photographer may not.

But why stop there? We have round lenses. Why not round sensors?

AquaDome · 02-10-2015, 10:34 PM

I would be okay with a digital Pentax 6x6. Can I get an adaptor for my Mamiya TLR lenses?

narual · 02-10-2015, 11:32 PM

Is the prism on the prototype really that large, or is it just an illusion from the angle the photo was taken at?

Originally posted by Paul the Sunman

A landscape photographer may not.

Didn't Ansel Adams prefer a 6x6 format for his landscape shooting, even if that's not how they ended up printed?

TomE · 02-11-2015, 12:00 AM

Ansel Adams proffered a 8x10 format and did contact prints of many of his photographs.

skierd · 02-11-2015, 12:17 AM

He mostly used large format cameras, 4x5 and 8x10's. Mostly for the movements, plus the size of the film.

A square format dslr wouldn't interest me unless the sensor was a full 6cmx6cm...

Paul the Sunman · 02-11-2015, 12:43 AM

I think the main point of a square MF is flexibility to crop. A square image is sometimes "right", but not that often. So I agree with you; a smaller square sensor is less attractive.

Tesla · 02-11-2015, 12:58 AM

They'll use what ever they can get from Sony. I don't think Sony makes a square sensor.

Paul the Sunman · 02-11-2015, 02:00 AM

Astronomical sensors are square.

Clavius · 02-11-2015, 03:07 AM - **1 Like**

OMG, a square sensor would be so rediculously cool. I love to crop most of my pictures to square format. It's my slightly autistic brain that just can't handle the imperfect ratios of the hodge podges of image formats. A rectangle that's not perfectly square is like a circle that's not quite exactly round, it freaks me out. I'd pay top price for square screens as well. I wonder why they invented the strange ratios in the first place.

02-10-2015, 08:52 PM	#1
Shanti Veteran Member Join Date: Jul 2012 Location: Western Denmark Photos: Gallery \| Albums Posts: 927	Round lens Square sensor What if the new FF has a square sensor?? anyone think the same. If the new teles cover more than FF (35mm) then that could be the reason. A square sensor that is cropped to what format is needed,also for pixel shifting maybe.The prism looks alot like an old 6x7 MF Pentax... I do wonder.........

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02-10-2015, 08:59 PM	#2
PentaxJax Site Supporter Join Date: Aug 2011 Location: Eastern shore Posts: 138	Originally posted by Shanti What if the new FF has a square sensor I guess you would not need a grip then

02-10-2015, 09:17 PM - 1 Like	#3
tuco Pentaxian Join Date: Jul 2009 Location: Pugetopolis Posts: 11,026	Originally posted by Shanti ...The prism looks alot like an old 6x7 MF Pentax... Yes, it does look like the newer Pentax 67II. I realize the branding on Pentax's 6x7/67/67II may be confusing to the uninitiated but for those of us shooting them it's like saying your K5II looks like a K-01. So here is what my Pentax 67 looks like in the spirit of learning more about Pentax's legacy product line.

02-10-2015, 09:22 PM	#4
Shanti Veteran Member Join Date: Jul 2012 Location: Western Denmark Photos: Gallery \| Albums Posts: 927 Original Poster	yeah its the newer one I meant & used long ago ..thanks for the info

02-10-2015, 09:25 PM	#5
Blue Moderator Site Supporter Join Date: Jun 2008 Location: Florida Hill Country Photos: Gallery \| Albums Posts: 17,377	Originally posted by Shanti What if the new FF has a square sensor?? anyone think the same. If the new teles cover more than FF (35mm) then that could be the reason. A square sensor that is cropped to what format is needed,also for pixel shifting maybe.The prism looks alot like an old 6x7 MF Pentax... I do wonder......... To be a true full frame 35mm sensor, the sensor would have to be 24x36, otherwise it would be another format.

02-10-2015, 09:28 PM	#6
Dr_who Veteran Member Join Date: Jun 2009 Location: Edmonton, Alberta, Canada Photos: Gallery \| Albums Posts: 777	Originally posted by Shanti What if the new FF has a square sensor?? anyone think the same. If the new teles cover more than FF (35mm) then that could be the reason. A square sensor that is cropped to what format is needed,also for pixel shifting maybe.The prism looks alot like an old 6x7 MF Pentax... I do wonder......... It looks like dozens and dozens of Pentax 35 mm cameras that have prisms as well.

02-10-2015, 09:44 PM	#7
Paul the Sunman Pentaxian Join Date: Aug 2011 Location: Melbourne Photos: Gallery Posts: 4,843	Originally posted by Shanti What if the new FF has a square sensor?? anyone think the same. If the new teles cover more than FF (35mm) then that could be the reason. A square sensor that is cropped to what format is needed,also for pixel shifting maybe.The prism looks alot like an old 6x7 MF Pentax... I do wonder......... The image circle for 36x24 FF has to have an image circle of at least 6√13 = 21.63mm radius for the corners to be covered. Existing lenses impose this constraint (ignoring hoods for the moment). A square sensor with the same radius image circle would have sides 6√26 = 30.59mm. Would you give up 5.41mm width for the extra 6.59mm height? A landscape photographer may not. But why stop there? We have round lenses. Why not round sensors?

02-10-2015, 10:34 PM	#8
AquaDome Veteran Member Join Date: Jan 2014 Location: New Carlisle, IN Photos: Gallery \| Albums Posts: 1,475	I would be okay with a digital Pentax 6x6. Can I get an adaptor for my Mamiya TLR lenses?

02-10-2015, 11:32 PM	#9
narual Veteran Member Join Date: Jun 2013 Location: South Bend (Notre Dame), Indiana Photos: Gallery \| Albums Posts: 1,988	Is the prism on the prototype really that large, or is it just an illusion from the angle the photo was taken at? Originally posted by Paul the Sunman A landscape photographer may not. Didn't Ansel Adams prefer a 6x6 format for his landscape shooting, even if that's not how they ended up printed?

02-11-2015, 12:00 AM	#10
TomE Senior Member Join Date: Sep 2006 Posts: 299	Ansel Adams proffered a 8x10 format and did contact prints of many of his photographs.

02-11-2015, 12:17 AM	#11
skierd Veteran Member Join Date: Mar 2011 Location: Fairbanks, AK Photos: Gallery Posts: 1,472	He mostly used large format cameras, 4x5 and 8x10's. Mostly for the movements, plus the size of the film. A square format dslr wouldn't interest me unless the sensor was a full 6cmx6cm...

02-11-2015, 12:43 AM	#12
Paul the Sunman Pentaxian Join Date: Aug 2011 Location: Melbourne Photos: Gallery Posts: 4,843	I think the main point of a square MF is flexibility to crop. A square image is sometimes "right", but not that often. So I agree with you; a smaller square sensor is less attractive.

02-11-2015, 12:58 AM	#13
Tesla Pentaxian Join Date: Mar 2013 Location: Washington State Posts: 589	They'll use what ever they can get from Sony. I don't think Sony makes a square sensor.

02-11-2015, 02:00 AM	#14
Paul the Sunman Pentaxian Join Date: Aug 2011 Location: Melbourne Photos: Gallery Posts: 4,843	Astronomical sensors are square.

02-11-2015, 03:07 AM - 1 Like	#15
Clavius Veteran Member Join Date: Feb 2011 Location: De Klundert Photos: Gallery Posts: 4,150	OMG, a square sensor would be so rediculously cool. I love to crop most of my pictures to square format. It's my slightly autistic brain that just can't handle the imperfect ratios of the hodge podges of image formats. A rectangle that's not perfectly square is like a circle that's not quite exactly round, it freaks me out. I'd pay top price for square screens as well. I wonder why they invented the strange ratios in the first place.