Full frame lenses on APS-C bodies

weaponx525 · 06-06-2016, 10:25 PM

Originally posted by BigDave

Quite simply, if a person is going to start with an APS-C sensor camera, but plan to get a FF sensor camera in the future, go for the FF glass now as much as you can but keep yours eyes open for that 10-20 or 12-24 lens for the APS-C sensor camera when the time and budget allow.

From the thread with DA lens compatability, it appears the DA 12-24 isn't compatible with the K1 until around the 15 mm range. Is this with out crop factor mode enabled?

pathdoc · 06-07-2016, 01:30 AM

Originally posted by weaponx525

From the thread with DA lens compatability, it appears the DA 12-24 isn't compatible with the K1 until around the 15 mm range. Is this with out crop factor mode enabled?

Yes by definition. In crop mode, all DA lenses are compatible; that is the reason for it. You still see the vignetting in the viewfinder but it isn't captured in the image. The crop frame will appear to show you how much you are getting and what's being left out..

weaponx525 · 06-07-2016, 10:41 PM

Price wise the 16-85 mm is on sale with $146 off. As the 28-105 mm is a new lens and not on sale, is it possible it may drop in price in the next two months? It so hard to fight LBA!

pathdoc · 06-08-2016, 03:51 AM - **1 Like**

Originally posted by weaponx525

It so hard to fight LBA!

Resistance is futile. *evil laugh*

All you can do is make sure you pick the best lens for the task at hand. Tell yourself, "LBA commands me to buy SOMETHING, but what is the BEST something for me?"

weaponx525 · 02-05-2017, 06:14 PM

Thank you for all the hints and comments. This forum is a big reason for me to stay Pentax. I buckled over boxing day and bought the 28-105 mm for $399 USD. I figured that I won't miss out on the wide end as I already own the DA 12-24. Also it is nice to get that little bit of extra reach over the 16-85 mm. Now, to get back to shooting....

C_Jones · 02-12-2017, 08:19 PM

Looks like you have a good variety to choose from now for your needs. Happy shooting.

zapp · 02-13-2017, 11:29 AM

In my opinion you cannot really build a lens line up on a crop sensor that will work as well on FF. I also think that lenses are designed for certain cameras and formats and that a 35mm FF lens is not the same as replacement for a normal lens on APS-C. The only lens I like in both worlds is the DFA 70-200.
Sold all my APS-C glass shortly after going FF. FF lenses will look/feel oversized and somehow wrong. I understand that it is tempting to start with an APS-Ccamera get FF lenses and later get the camera for it, but it will always feel like a compromise. Get a used FF camera and decent glass to start cheap. Can't find a cheap used Pentax FF body, well, sorry Pentax. I would not consider putting my 24-70 on a K3 - it feels just wrong. 82 mm filter diameter zoom on an APS-C camera.
Best Pentax option, get a generic APS-C short zoom and buy a 70-200 to go with it. Keep the 70-200 for live and replace the short zoom at some point.

**UncleVanya** · 02-13-2017, 04:53 PM

Originally posted by zapp

In my opinion you cannot really build a lens line up on a crop sensor that will work as well on FF. I also think that lenses are designed for certain cameras and formats and that a 35mm FF lens is not the same as replacement for a normal lens on APS-C. The only lens I like in both worlds is the DFA 70-200.
Sold all my APS-C glass shortly after going FF. FF lenses will look/feel oversized and somehow wrong. I understand that it is tempting to start with an APS-Ccamera get FF lenses and later get the camera for it, but it will always feel like a compromise. Get a used FF camera and decent glass to start cheap. Can't find a cheap used Pentax FF body, well, sorry Pentax. I would not consider putting my 24-70 on a K3 - it feels just wrong. 82 mm filter diameter zoom on an APS-C camera.
Best Pentax option, get a generic APS-C short zoom and buy a 70-200 to go with it. Keep the 70-200 for live and replace the short zoom at some point.

My current line up of lenses that are full frame or nearly full frame:

FA limited 31, DA limited 40, F 50 f1.7, DA LTD 70, FA ltd 77, DFA 100 WR, Da* 200, FA* 300

DA* 60-250

I enjoy these on my K-3 as they are. I do have apsc lenses that fill some gaps including the wider end on apsc.

---------- Post added 02-13-17 at 06:54 PM ----------

Oh I forgot the A 50 f2 and Takumar bayonet 135 f2.5 and a few others.

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06-06-2016, 10:25 PM	#31
weaponx525 Senior Member Join Date: Jul 2007 Photos: Gallery Posts: 138 Original Poster	Originally posted by BigDave Quite simply, if a person is going to start with an APS-C sensor camera, but plan to get a FF sensor camera in the future, go for the FF glass now as much as you can but keep yours eyes open for that 10-20 or 12-24 lens for the APS-C sensor camera when the time and budget allow. From the thread with DA lens compatability, it appears the DA 12-24 isn't compatible with the K1 until around the 15 mm range. Is this with out crop factor mode enabled?

06-07-2016, 01:30 AM	#32
pathdoc Pentaxian Join Date: Mar 2015 Photos: Gallery \| Albums Posts: 6,381	Originally posted by weaponx525 From the thread with DA lens compatability, it appears the DA 12-24 isn't compatible with the K1 until around the 15 mm range. Is this with out crop factor mode enabled? Yes by definition. In crop mode, all DA lenses are compatible; that is the reason for it. You still see the vignetting in the viewfinder but it isn't captured in the image. The crop frame will appear to show you how much you are getting and what's being left out..

06-07-2016, 10:41 PM	#33
weaponx525 Senior Member Join Date: Jul 2007 Photos: Gallery Posts: 138 Original Poster	Price wise the 16-85 mm is on sale with $146 off. As the 28-105 mm is a new lens and not on sale, is it possible it may drop in price in the next two months? It so hard to fight LBA!

06-08-2016, 03:51 AM - 1 Like	#34
pathdoc Pentaxian Join Date: Mar 2015 Photos: Gallery \| Albums Posts: 6,381	Originally posted by weaponx525 It so hard to fight LBA! Resistance is futile. evil laugh All you can do is make sure you pick the best lens for the task at hand. Tell yourself, "LBA commands me to buy SOMETHING, but what is the BEST something for me?"

02-05-2017, 06:14 PM	#35
weaponx525 Senior Member Join Date: Jul 2007 Photos: Gallery Posts: 138 Original Poster	Thank you for all the hints and comments. This forum is a big reason for me to stay Pentax. I buckled over boxing day and bought the 28-105 mm for $399 USD. I figured that I won't miss out on the wide end as I already own the DA 12-24. Also it is nice to get that little bit of extra reach over the 16-85 mm. Now, to get back to shooting....

02-12-2017, 08:19 PM	#36
C_Jones Pentaxian Join Date: Sep 2012 Location: NY Photos: Gallery \| Albums Posts: 6,084	Looks like you have a good variety to choose from now for your needs. Happy shooting.

02-13-2017, 11:29 AM	#37
zapp Pentaxian Join Date: Jul 2011 Posts: 2,385	In my opinion you cannot really build a lens line up on a crop sensor that will work as well on FF. I also think that lenses are designed for certain cameras and formats and that a 35mm FF lens is not the same as replacement for a normal lens on APS-C. The only lens I like in both worlds is the DFA 70-200. Sold all my APS-C glass shortly after going FF. FF lenses will look/feel oversized and somehow wrong. I understand that it is tempting to start with an APS-Ccamera get FF lenses and later get the camera for it, but it will always feel like a compromise. Get a used FF camera and decent glass to start cheap. Can't find a cheap used Pentax FF body, well, sorry Pentax. I would not consider putting my 24-70 on a K3 - it feels just wrong. 82 mm filter diameter zoom on an APS-C camera. Best Pentax option, get a generic APS-C short zoom and buy a 70-200 to go with it. Keep the 70-200 for live and replace the short zoom at some point.

02-13-2017, 04:53 PM	#38
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,401	Originally posted by zapp In my opinion you cannot really build a lens line up on a crop sensor that will work as well on FF. I also think that lenses are designed for certain cameras and formats and that a 35mm FF lens is not the same as replacement for a normal lens on APS-C. The only lens I like in both worlds is the DFA 70-200. Sold all my APS-C glass shortly after going FF. FF lenses will look/feel oversized and somehow wrong. I understand that it is tempting to start with an APS-Ccamera get FF lenses and later get the camera for it, but it will always feel like a compromise. Get a used FF camera and decent glass to start cheap. Can't find a cheap used Pentax FF body, well, sorry Pentax. I would not consider putting my 24-70 on a K3 - it feels just wrong. 82 mm filter diameter zoom on an APS-C camera. Best Pentax option, get a generic APS-C short zoom and buy a 70-200 to go with it. Keep the 70-200 for live and replace the short zoom at some point. My current line up of lenses that are full frame or nearly full frame: FA limited 31, DA limited 40, F 50 f1.7, DA LTD 70, FA ltd 77, DFA 100 WR, Da* 200, FA* 300 DA* 60-250 I enjoy these on my K-3 as they are. I do have apsc lenses that fill some gaps including the wider end on apsc. ---------- Post added 02-13-17 at 06:54 PM ---------- Oh I forgot the A 50 f2 and Takumar bayonet 135 f2.5 and a few others.