Full Frame Lenses

Kguru · 10-24-2009, 03:26 AM

Originally posted by Taff

As we all know the FA series in Pentax, The DG series in Sigma are made for the Full Frame SLR or full Frame sensor.

Made for FF slr but not necessarily for FF sensor.
Sure FA's image circle is big enough, but according to Ned B, that doesn't make them good enough for FF sensor.

Shall we believe Ned B, or take that comment as a deflection from him?

pcarfan · 10-24-2009, 04:45 AM

Originally posted by Kguru

Made for FF slr but not necessarily for FF sensor.
Sure FA's image circle is big enough, but according to Ned B, that doesn't make them good enough for FF sensor.

Shall we believe Ned B, or take that comment as a deflection from him?

He and Pentax also says they are not good enough for APS-C.

Taff · 10-24-2009, 07:32 AM

Started quite a thread here. I am sure i have read somewhere that FF lenses project the image onto an APS sensor at the incorrect angle for it to be the optimum image

axl · 10-24-2009, 09:23 AM

Originally posted by Taff

Started quite a thread here. I am sure i have read somewhere that FF lenses project the image onto an APS sensor at the incorrect angle for it to be the optimum image

I have read something similar,
but as an owner of few FF lenses I do doubt this has any significant effect. Anybody who has owned or shot good quality FF glass would confirm this I believe.
And many great shots on these forums from FF designs as old os 4-5 decades or even older speak for themselves.

Peter

kristoffon · 10-24-2009, 09:51 AM

Originally posted by axl

I have read something similar,
but as an owner of few FF lenses I do doubt this has any significant effect. Anybody who has owned or shot good quality FF glass would confirm this I believe.
And many great shots on these forums from FF designs as old os 4-5 decades or even older speak for themselves.

Peter

that's just bull

if you search enough you'll find someone saying that leaving the camera next to a glass of water stabilizes its molecules for lower high iso noise

Kguru · 10-24-2009, 10:11 AM

Originally posted by axl

I have read something similar, but as an owner of few FF lenses I do doubt this has any significant effect. Anybody who has owned or shot good quality FF glass would confirm this I believe.
And many great shots on these forums from FF designs as old os 4-5 decades or even older speak for themselves.
Peter

What you have seen is FA lenses on FF film, or on APS sensor. I doubt many of us have seen FA lenses on FF sensor though.

I understand it's the effects of light angle hitting the outer parts of the FF sensor (i.e. more severe than APS sensor's) that FA lenses were not catered for in their film-era design.

irchan · 10-24-2009, 10:39 AM

i am using pentax full-frame 20 megapixel camera

https://www.pentaxforums.com/forums/pentax-film-slr-discussion/77468-k-50mm-1...uji-reala.html

axl · 10-24-2009, 11:31 AM

Originally posted by kristoffon

that's just bull

if you search enough you'll find someone saying that leaving the camera next to a glass of water stabilizes its molecules for lower high iso noise

thanks for confirming...

axl · 10-24-2009, 11:35 AM

Originally posted by Kguru

What you have seen is FA lenses on FF film, or on APS sensor. I doubt many of us have seen FA lenses on FF sensor though.

I understand it's the effects of light angle hitting the outer parts of the FF sensor (i.e. more severe than APS sensor's) that FA lenses were not catered for in their film-era design.

How is the angle of light falling on 135 format film from FA lens different from angle of light falling on FF sensor from the same FA LENS???
To my understannding the whole point of FF sensor is to make digital sensors the same size as film, i.e. the size of the medium the FF lenses were designedd for!

in other words, do you think older CANIKON lennses used on the newest FF bodies are underperforming because the light from them is falling on the sensor differently than it would on the film???

Kguru · 10-24-2009, 07:15 PM

Originally posted by axl

How is the angle of light falling on 135 format film from FA lens different from angle of light falling on FF sensor from the same FA LENS???
To my understannding the whole point of FF sensor is to make digital sensors the same size as film, i.e. the size of the medium the FF lenses were designedd for!

The angle of light is of course the same, it's the response to angled light that is different between film and electronic sensor. I vaguely remember reading somewhere: the film surface is essentially flat while sensor surface contains rows of hills and valleys; imagine trying to dodge the bullets from an airplane's forward machine gun, your survival chance is very different in hilly terrain vs a desert

Taff · 10-25-2009, 12:57 AM

I agree that some photo's from old lenses are just unbeatable in quality,

axl · 10-25-2009, 01:00 AM

Originally posted by Kguru

The angle of light is of course the same, it's the response to angled light that is different between film and electronic sensor. I vaguely remember reading somewhere: the film surface is essentially flat while sensor surface contains rows of hills and valleys; imagine trying to dodge the bullets from an airplane's forward machine gun, your survival chance is very different in hilly terrain vs a desert

I see what you're saying, but is so relevant?
If you look at all CANIKONS using the same lenses as they did for film....

10-24-2009, 11:35 AM	#39
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183	Originally posted by Kguru What you have seen is FA lenses on FF film, or on APS sensor. I doubt many of us have seen FA lenses on FF sensor though. I understand it's the effects of light angle hitting the outer parts of the FF sensor (i.e. more severe than APS sensor's) that FA lenses were not catered for in their film-era design. How is the angle of light falling on 135 format film from FA lens different from angle of light falling on FF sensor from the same FA LENS??? To my understannding the whole point of FF sensor is to make digital sensors the same size as film, i.e. the size of the medium the FF lenses were designedd for! in other words, do you think older CANIKON lennses used on the newest FF bodies are underperforming because the light from them is falling on the sensor differently than it would on the film??? Last edited by axl; 10-24-2009 at 11:43 AM.

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10-24-2009, 03:26 AM	#31
Kguru Veteran Member Join Date: Jun 2007 Location: Perth - WestAust Posts: 602	Originally posted by Taff As we all know the FA series in Pentax, The DG series in Sigma are made for the Full Frame SLR or full Frame sensor. Made for FF slr but not necessarily for FF sensor. Sure FA's image circle is big enough, but according to Ned B, that doesn't make them good enough for FF sensor. Shall we believe Ned B, or take that comment as a deflection from him?

10-24-2009, 04:45 AM	#32
pcarfan Veteran Member Join Date: Sep 2007 Location: Dayton, Ohio Photos: Gallery \| Albums Posts: 2,978	Originally posted by Kguru Made for FF slr but not necessarily for FF sensor. Sure FA's image circle is big enough, but according to Ned B, that doesn't make them good enough for FF sensor. Shall we believe Ned B, or take that comment as a deflection from him? He and Pentax also says they are not good enough for APS-C.

10-24-2009, 07:32 AM	#33
Taff Veteran Member Join Date: Aug 2008 Location: Perth Western Australia Photos: Gallery \| Albums Posts: 1,612 Original Poster	Started quite a thread here. I am sure i have read somewhere that FF lenses project the image onto an APS sensor at the incorrect angle for it to be the optimum image

10-24-2009, 09:23 AM	#34
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183	Originally posted by Taff Started quite a thread here. I am sure i have read somewhere that FF lenses project the image onto an APS sensor at the incorrect angle for it to be the optimum image I have read something similar, but as an owner of few FF lenses I do doubt this has any significant effect. Anybody who has owned or shot good quality FF glass would confirm this I believe. And many great shots on these forums from FF designs as old os 4-5 decades or even older speak for themselves. Peter

10-24-2009, 09:51 AM	#35
kristoffon Veteran Member Join Date: Aug 2008 Location: Brazil Posts: 532	Originally posted by axl I have read something similar, but as an owner of few FF lenses I do doubt this has any significant effect. Anybody who has owned or shot good quality FF glass would confirm this I believe. And many great shots on these forums from FF designs as old os 4-5 decades or even older speak for themselves. Peter that's just bull if you search enough you'll find someone saying that leaving the camera next to a glass of water stabilizes its molecules for lower high iso noise

10-24-2009, 10:11 AM	#36
Kguru Veteran Member Join Date: Jun 2007 Location: Perth - WestAust Posts: 602	Originally posted by axl I have read something similar, but as an owner of few FF lenses I do doubt this has any significant effect. Anybody who has owned or shot good quality FF glass would confirm this I believe. And many great shots on these forums from FF designs as old os 4-5 decades or even older speak for themselves. Peter What you have seen is FA lenses on FF film, or on APS sensor. I doubt many of us have seen FA lenses on FF sensor though. I understand it's the effects of light angle hitting the outer parts of the FF sensor (i.e. more severe than APS sensor's) that FA lenses were not catered for in their film-era design.

10-24-2009, 10:39 AM	#37
irchan Forum Member Join Date: Mar 2008 Location: Indonesia Posts: 55	i am using pentax full-frame 20 megapixel camera https://www.pentaxforums.com/forums/pentax-film-slr-discussion/77468-k-50mm-1...uji-reala.html

10-24-2009, 11:31 AM	#38
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183	Originally posted by kristoffon that's just bull if you search enough you'll find someone saying that leaving the camera next to a glass of water stabilizes its molecules for lower high iso noise thanks for confirming...

10-24-2009, 07:15 PM	#40
Kguru Veteran Member Join Date: Jun 2007 Location: Perth - WestAust Posts: 602	Originally posted by axl How is the angle of light falling on 135 format film from FA lens different from angle of light falling on FF sensor from the same FA LENS??? To my understannding the whole point of FF sensor is to make digital sensors the same size as film, i.e. the size of the medium the FF lenses were designedd for! The angle of light is of course the same, it's the response to angled light that is different between film and electronic sensor. I vaguely remember reading somewhere: the film surface is essentially flat while sensor surface contains rows of hills and valleys; imagine trying to dodge the bullets from an airplane's forward machine gun, your survival chance is very different in hilly terrain vs a desert

10-25-2009, 12:57 AM	#41
Taff Veteran Member Join Date: Aug 2008 Location: Perth Western Australia Photos: Gallery \| Albums Posts: 1,612 Original Poster	I agree that some photo's from old lenses are just unbeatable in quality,

10-25-2009, 01:00 AM	#42
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183	Originally posted by Kguru The angle of light is of course the same, it's the response to angled light that is different between film and electronic sensor. I vaguely remember reading somewhere: the film surface is essentially flat while sensor surface contains rows of hills and valleys; imagine trying to dodge the bullets from an airplane's forward machine gun, your survival chance is very different in hilly terrain vs a desert I see what you're saying, but is so relevant? If you look at all CANIKONS using the same lenses as they did for film....