Full Frame Digital with DA lenses

Kguru · 07-26-2008, 08:34 AM

Kinda similar to the K20D's AF adjustments for up to 20 lenses, Pentax should provide menu options for users to set up their own crop factor per lens.

Better do before I get a patent on it

falconeye · 07-26-2008, 08:54 AM

Originally posted by Kguru

Better do before I get a patent on it

Now, that you published it here. it isn't patentable anymore. Prior art

May I add the square crop option?

Cideway · 07-26-2008, 08:56 AM

Originally posted by Kguru

Kinda similar to the K20D's AF adjustments for up to 20 lenses, Pentax should provide menu options for users to set up their own crop factor per lens.

Better do before I get a patent on it

Best of all worlds.

truonganh · 07-30-2008, 12:16 PM

I have a compact Panasonic DMC-TZ3 that has 3 aspect ratio (4:3, 3:2, and 16:9) If you draw these on top of each other, you will find it's fit nicely in a circle. I really LOVE this, especially at 16:9. it extends the frame to maximize the image circle of the lens and you'd get a wider landscape coverage. What a fantastic idea to get the most out of the lens.

If they can't provide the 'selectable aspect ratio' cropping on DA lens, at least they should have the 'crop on/off' option so that the user can crop the frame to whatever ratio they see fit.

cpopham · 07-30-2008, 03:41 PM

Personally, although FF doesn't interest me in the slightest (I like the lighter, more compact APS gear), consider that the best of both worlds is possible:

Uncropped RAW, complete with vignetting, and automatically cropped JPEG, based on camera settings. Presumably, Pentax would just add some sort of cropping control to the firmware table they have of aperture sweet spots for lenses.

In that scenario, RAW+JPEG delivers the best of both worlds - you get a cropped and readily usable image from the JPEG, and if you want to push it, you have the RAW file available which you will have to crop manually.

(Although presumably the Pentax supplied software will be able to perform this crop automatically, the same way it can generate JPEGs based on the camera settings)

It's exactly the sort of crafty move I'd expect them to pull, only to continue to be pretty much ignored by everyone.

truonganh · 08-05-2008, 09:06 AM

Originally posted by GaryM

So, you're effectively cropping your bigger and more expensive FF camera back to APS-C, nullifying any advantage of the larger sensor. Seems kind of... pointless?

from what i know: not really. FF sensor "should" have better signal to noise ratio. Cropping to APS-C size only reduce the amount of pixels available. It doesn't change FF advantage in the improved noise.

However, if they're in a pixel race and supply FF chip with pixel density to the same of APS-C density, you'll be right, since the whole thing would be pointless if all you have is DA lens. i have 2 DA lens.

AnoLife · 08-12-2008, 01:42 AM

Does someone know if the upcoming DA* 60-250 lens will be FullFrame? I want to know that, because I want in the future an FullFrame camera of Pentax and then I do not want to replace a lot of glass.

Zebooka · 08-12-2008, 04:31 AM

Yes, it will.

AnoLife · 08-12-2008, 05:05 AM

Thank you!

Good news!

Serpiente · 08-12-2008, 07:38 AM

Does anyone know if the DA* 16-50 2.8 is FF-compatible?

I want this lense but if this lense is useless on my next (probably FF) camera I wont buy it.

thibs · 08-12-2008, 09:11 AM

Originally posted by Serpiente

Does anyone know if the DA* 16-50 2.8 is FF-compatible?

I want this lense but if this lense is useless on my next (probably FF) camera I wont buy it.

Not at all and btw, nothing remotely official can make us think that the 60-250 would be indeed FF lens. It might be but before an official statement, I would make up my mind.

brad007 · 08-20-2008, 01:51 PM

Does anyone know if the DA* 50-135 2.8 is FF-compatible?

eurostar · 08-20-2008, 11:07 PM

No, it isn't. So far, just 40 LTD, 70 LTD, 200* and 300* are the DA that cover the image circle needed by 24x36mm sensors.

If they carry the quality needed for such a sensor nobody knows, being that sensor not yet in existence.

07-30-2008, 12:16 PM	#19
truonganh Senior Member Join Date: Nov 2007 Location: Bay area, CA Photos: Gallery Posts: 194	..crop factor could learn something from Panasonic TZ-3 I have a compact Panasonic DMC-TZ3 that has 3 aspect ratio (4:3, 3:2, and 16:9) If you draw these on top of each other, you will find it's fit nicely in a circle. I really LOVE this, especially at 16:9. it extends the frame to maximize the image circle of the lens and you'd get a wider landscape coverage. What a fantastic idea to get the most out of the lens. If they can't provide the 'selectable aspect ratio' cropping on DA lens, at least they should have the 'crop on/off' option so that the user can crop the frame to whatever ratio they see fit.

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07-26-2008, 08:34 AM	#16
Kguru Veteran Member Join Date: Jun 2007 Location: Perth - WestAust Posts: 602	Kinda similar to the K20D's AF adjustments for up to 20 lenses, Pentax should provide menu options for users to set up their own crop factor per lens. Better do before I get a patent on it

07-26-2008, 08:54 AM	#17
falconeye Veteran Member Join Date: Jan 2008 Location: Munich, Alps, Germany Photos: Gallery Posts: 6,871	Originally posted by Kguru Better do before I get a patent on it Now, that you published it here. it isn't patentable anymore. Prior art May I add the square crop option?

07-26-2008, 08:56 AM	#18
Cideway Inactive Account Join Date: Feb 2007 Location: Adelaide, South Australia, Australia Photos: Gallery Posts: 364	Originally posted by Kguru Kinda similar to the K20D's AF adjustments for up to 20 lenses, Pentax should provide menu options for users to set up their own crop factor per lens. Better do before I get a patent on it Best of all worlds.

07-30-2008, 03:41 PM	#20
cpopham Veteran Member Join Date: Mar 2008 Location: Auckland Posts: 553	Personally, although FF doesn't interest me in the slightest (I like the lighter, more compact APS gear), consider that the best of both worlds is possible: Uncropped RAW, complete with vignetting, and automatically cropped JPEG, based on camera settings. Presumably, Pentax would just add some sort of cropping control to the firmware table they have of aperture sweet spots for lenses. In that scenario, RAW+JPEG delivers the best of both worlds - you get a cropped and readily usable image from the JPEG, and if you want to push it, you have the RAW file available which you will have to crop manually. (Although presumably the Pentax supplied software will be able to perform this crop automatically, the same way it can generate JPEGs based on the camera settings) It's exactly the sort of crafty move I'd expect them to pull, only to continue to be pretty much ignored by everyone.

08-05-2008, 09:06 AM	#21
truonganh Senior Member Join Date: Nov 2007 Location: Bay area, CA Photos: Gallery Posts: 194	Originally posted by GaryM So, you're effectively cropping your bigger and more expensive FF camera back to APS-C, nullifying any advantage of the larger sensor. Seems kind of... pointless? from what i know: not really. FF sensor "should" have better signal to noise ratio. Cropping to APS-C size only reduce the amount of pixels available. It doesn't change FF advantage in the improved noise. However, if they're in a pixel race and supply FF chip with pixel density to the same of APS-C density, you'll be right, since the whole thing would be pointless if all you have is DA lens. i have 2 DA lens.

08-12-2008, 01:42 AM	#22
AnoLife Forum Member Join Date: Nov 2007 Location: Rotterdam Posts: 61	Does someone know if the upcoming DA* 60-250 lens will be FullFrame? I want to know that, because I want in the future an FullFrame camera of Pentax and then I do not want to replace a lot of glass.

08-12-2008, 04:31 AM	#23
Zebooka Veteran Member Join Date: May 2008 Location: Russia, Siberia, Novosibirsk Posts: 323	Yes, it will.

08-12-2008, 05:05 AM	#24
AnoLife Forum Member Join Date: Nov 2007 Location: Rotterdam Posts: 61	Thank you! Good news!

08-12-2008, 07:38 AM	#25
Serpiente Senior Member Join Date: Jul 2008 Posts: 154	Does anyone know if the DA* 16-50 2.8 is FF-compatible? I want this lense but if this lense is useless on my next (probably FF) camera I wont buy it.

08-12-2008, 09:11 AM	#26
thibs Pentaxian Join Date: Jun 2007 Location: Belgium Photos: Albums Posts: 7,001	Originally posted by Serpiente Does anyone know if the DA* 16-50 2.8 is FF-compatible? I want this lense but if this lense is useless on my next (probably FF) camera I wont buy it. Not at all and btw, nothing remotely official can make us think that the 60-250 would be indeed FF lens. It might be but before an official statement, I would make up my mind.

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08-20-2008, 01:51 PM	#27
brad007 New Member Join Date: Aug 2008 Posts: 3	Does anyone know if the DA* 50-135 2.8 is FF-compatible?

08-20-2008, 11:07 PM	#28
eurostar Veteran Member Join Date: Dec 2006 Location: Albareto, Italy Photos: Gallery Posts: 819	No, it isn't. So far, just 40 LTD, 70 LTD, 200* and 300* are the DA that cover the image circle needed by 24x36mm sensors. If they carry the quality needed for such a sensor nobody knows, being that sensor not yet in existence.