Older lenses on a K-30

jcdoss · 11-13-2012, 02:50 PM

I've just switched over to Pentax, partly due to compact size of the system, and partly due to the ability to use some older manual focus lenses with SR on a newer, ergonomically superior body.

My question is kind of nit-picky, but I'm curious to know whether aperture info will be saved into the EXIF info for lenses in each series (ie, K-series? M-Series? A-series?). I'm willing to put up with idiosyncrasies, but I'm a perfectionist nerd, and blanks in the EXIF will probably bug me after a while.

Thanks!
JCD

**boriscleto** · 11-13-2012, 02:55 PM

Pentax K-Mount Lenses Explained: The differences between various Pentax lens series

Screw mount, K & M lenses do not save aperture data. A series lenses work just like an autofocus lens without the autofocus. That is the main reason A series lenses command a premium over KM lenses.

The "crippled" K mount has no aperture coupling, therefore the camera does not know what the aperture is set to. That is why you have to use step down metering with KM lenses.

jcdoss · 11-13-2012, 03:06 PM

For the A series lenses, will it record aperture info even if the aperture ring is set to something other than "A"?

elliott · 11-13-2012, 03:07 PM

Originally posted by jcdoss

For the A series lenses, will it record aperture info even if the aperture ring is set to something other than "A"?

No, it only knows what the aperture is if the ring is on A.

**boriscleto** · 11-13-2012, 03:08 PM

Originally posted by jcdoss

For the A series lenses, will it record aperture info even if the aperture ring is set to something other than "A"?

No. If the lens is not set to A it will be a KM lens as far as the camera is concerned.

demp10 · 11-13-2012, 03:27 PM

You can always edit the EXIF data and add all the info manually

elliott · 11-13-2012, 03:29 PM

Originally posted by demp10

You can always edit the EXIF data and add all the info manually

Which means going back to the old film days and writing everything down while you do it.

jcdoss · 11-13-2012, 03:37 PM

Originally posted by elliott

Which means going back to the old film days and writing everything down while you do it.

Exactly. Poo! I'll have to shop carefully. Thanks for the info, everyone!

elliott · 11-13-2012, 03:45 PM

Originally posted by jcdoss

Exactly. Poo! I'll have to shop carefully.

Don't rule out all of the non-A glass, you'd be missing out on some really good stuff, like a lot of the awesome K series glass that is better than the M or A glass that came after it. You'd also be ruling out all of the Takumars and the other great M42 stuff out there. It isn't much of an inconvenience, especially if you're willing to shoot with manual focus stuff anyway, you're not going for speed.

vladimiroltean · 11-13-2012, 03:48 PM

Originally posted by demp10

You can always edit the EXIF data and add all the info manually

How?

**boriscleto** · 11-13-2012, 03:50 PM

Originally posted by kcobain1992

How?

PhotoME for Window$. ExifTool for Mac & Linux.

Professor Batty · 11-13-2012, 06:09 PM

If you enter the focal length and press OK on startup for anti shake it will record which lens you shot with, the only blank in your exif will be aperture.

curlednoodles · 11-26-2012, 04:27 AM

edited due to inaccuracy.

hopsing · 11-26-2012, 01:42 PM

@curlednoodles,
I think (without pressing the green button), this will only works in open aperture mode (Av).

elliott · 11-26-2012, 01:46 PM

Originally posted by hopsing

@curlednoodles,
I think (without pressing the green button), this will only works in open aperture mode (Av).

Which means a K mount lens will keep the aperture wide open.

11-13-2012, 02:50 PM	#1
jcdoss Pentaxian Join Date: Nov 2012 Location: Ingelheim am Rhein, Germany Photos: Gallery \| Albums Posts: 6,757	Older lenses on a K-30 I've just switched over to Pentax, partly due to compact size of the system, and partly due to the ability to use some older manual focus lenses with SR on a newer, ergonomically superior body. My question is kind of nit-picky, but I'm curious to know whether aperture info will be saved into the EXIF info for lenses in each series (ie, K-series? M-Series? A-series?). I'm willing to put up with idiosyncrasies, but I'm a perfectionist nerd, and blanks in the EXIF will probably bug me after a while. Thanks! JCD

11-26-2012, 04:27 AM	#13
curlednoodles Senior Member Join Date: Jul 2012 Location: Far North Qld, Australia Posts: 184	edited due to inaccuracy. Last edited by curlednoodles; 11-29-2012 at 01:39 PM.

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11-13-2012, 02:55 PM	#2
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,473	Pentax K-Mount Lenses Explained: The differences between various Pentax lens series Screw mount, K & M lenses do not save aperture data. A series lenses work just like an autofocus lens without the autofocus. That is the main reason A series lenses command a premium over KM lenses. The "crippled" K mount has no aperture coupling, therefore the camera does not know what the aperture is set to. That is why you have to use step down metering with KM lenses.

11-13-2012, 03:06 PM	#3
jcdoss Pentaxian Join Date: Nov 2012 Location: Ingelheim am Rhein, Germany Photos: Gallery \| Albums Posts: 6,757 Original Poster	For the A series lenses, will it record aperture info even if the aperture ring is set to something other than "A"?

11-13-2012, 03:07 PM	#4
elliott Inactive Account Join Date: Dec 2008 Location: North Carolina Photos: Albums Posts: 1,720	Originally posted by jcdoss For the A series lenses, will it record aperture info even if the aperture ring is set to something other than "A"? No, it only knows what the aperture is if the ring is on A.

11-13-2012, 03:08 PM	#5
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,473	Originally posted by jcdoss For the A series lenses, will it record aperture info even if the aperture ring is set to something other than "A"? No. If the lens is not set to A it will be a KM lens as far as the camera is concerned.

11-13-2012, 03:27 PM	#6
demp10 Veteran Member Join Date: Jun 2011 Location: Atlanta Photos: Albums Posts: 602	You can always edit the EXIF data and add all the info manually

11-13-2012, 03:29 PM	#7
elliott Inactive Account Join Date: Dec 2008 Location: North Carolina Photos: Albums Posts: 1,720	Originally posted by demp10 You can always edit the EXIF data and add all the info manually Which means going back to the old film days and writing everything down while you do it.

11-13-2012, 03:37 PM	#8
jcdoss Pentaxian Join Date: Nov 2012 Location: Ingelheim am Rhein, Germany Photos: Gallery \| Albums Posts: 6,757 Original Poster	Originally posted by elliott Which means going back to the old film days and writing everything down while you do it. Exactly. Poo! I'll have to shop carefully. Thanks for the info, everyone!

11-13-2012, 03:45 PM	#9
elliott Inactive Account Join Date: Dec 2008 Location: North Carolina Photos: Albums Posts: 1,720	Originally posted by jcdoss Exactly. Poo! I'll have to shop carefully. Don't rule out all of the non-A glass, you'd be missing out on some really good stuff, like a lot of the awesome K series glass that is better than the M or A glass that came after it. You'd also be ruling out all of the Takumars and the other great M42 stuff out there. It isn't much of an inconvenience, especially if you're willing to shoot with manual focus stuff anyway, you're not going for speed.

11-13-2012, 03:48 PM	#10
vladimiroltean Veteran Member Join Date: Dec 2010 Location: Bucharest, Romania Photos: Gallery Posts: 1,465	Originally posted by demp10 You can always edit the EXIF data and add all the info manually How?

11-13-2012, 03:50 PM	#11
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,473	Originally posted by kcobain1992 How? PhotoME for Window$. ExifTool for Mac & Linux.

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11-13-2012, 06:09 PM	#12
Professor Batty Senior Member Join Date: Aug 2012 Posts: 118	If you enter the focal length and press OK on startup for anti shake it will record which lens you shot with, the only blank in your exif will be aperture.

11-26-2012, 01:42 PM	#14
hopsing Junior Member Join Date: Jun 2012 Photos: Gallery Posts: 49	@curlednoodles, I think (without pressing the green button), this will only works in open aperture mode (Av).

11-26-2012, 01:46 PM	#15
elliott Inactive Account Join Date: Dec 2008 Location: North Carolina Photos: Albums Posts: 1,720	Originally posted by hopsing @curlednoodles, I think (without pressing the green button), this will only works in open aperture mode (Av). Which means a K mount lens will keep the aperture wide open.