Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
04-29-2010, 05:26 PM   #1
Pentaxian
eccs19's Avatar

Join Date: Jul 2008
Location: Lisle, Ontario
Photos: Gallery
Posts: 1,464
K7 & screw mount lenses

Just got my K7 today, and have been playing a little bit with it so far. Getting dark / late, so will have more time to play tomorrow. Of course I've got a couple questions. When using your older glass, so you set your metering for light and focus, do you use center, multi or what? Just wondering what works best with these older lenses.

04-29-2010, 05:33 PM   #2
Ira
Inactive Account




Join Date: Mar 2009
Location: Coral Springs, FL
Photos: Gallery | Albums
Posts: 5,216
QuoteOriginally posted by eccs19 Quote
Just got my K7 today, and have been playing a little bit with it so far. Getting dark / late, so will have more time to play tomorrow. Of course I've got a couple questions. When using your older glass, so you set your metering for light and focus, do you use center, multi or what? Just wondering what works best with these older lenses.

You're talking about your Taks:

1) Manual metering mode. (Not Av!!!)

2) Center focus point.

3) Center weighted metering.

4) Green button for Tv shift, which locks in the correct shutter speed based on the aperture you manually selected.

On the kx, the EV button does the same thing, but don't know about the K7.
04-29-2010, 05:46 PM   #3
Pentaxian
eccs19's Avatar

Join Date: Jul 2008
Location: Lisle, Ontario
Photos: Gallery
Posts: 1,464
Original Poster
Thanks for the info. I'm surprised at the recommendation NOT to use AV mode. That's all I used with my *istD. Any reason for that?
04-29-2010, 06:00 PM   #4
Inactive Account




Join Date: Apr 2010
Location: Attleboro ma
Posts: 26
I'm wondering the same on not using AV.

I been using Av mode with use of my older manual lenses with out a problem

04-29-2010, 06:13 PM   #5
Site Supporter
boriscleto's Avatar

Join Date: Dec 2009
Location: Liverpool, NY
Photos: Gallery
Posts: 12,863
AV works but you will have to play around with the EV. I usually end up with an EV of +2.
04-29-2010, 06:24 PM   #6
Ira
Inactive Account




Join Date: Mar 2009
Location: Coral Springs, FL
Photos: Gallery | Albums
Posts: 5,216
Two reasons for M and not Av:

1) Your experiences may differ, but on the KX and with my Taks and other M42s, Av stinks. It always underexposes and it's not consistent across various lenses, nor across F stops on the same lens.

2) Once you put a manual lens on there and are going manual, you might as well shoot manual--and Av doesn't count. As it is, DSLRs are finicky metering this old glass, so why would you want a 1" turn of your camera to the left or right dramatically changing your exposure? I want to meter on the appropriate area, hit my button, reframe, and it's locked in at that exposure.

Last edited by Ira; 04-29-2010 at 06:35 PM.
04-29-2010, 06:24 PM   #7
Veteran Member




Join Date: Nov 2008
Location: Melbourne
Photos: Gallery
Posts: 3,549
I always use Av mode with my Super Tak. I usually find myself at EV +2 also.

Considering screw mount lenses are MF, I don't think it would matter what setting you had your AF on.
04-29-2010, 06:26 PM   #8
Veteran Member




Join Date: Nov 2008
Location: Melbourne
Photos: Gallery
Posts: 3,549
QuoteOriginally posted by Ira Quote
2) Once you put a manual lens on there and are going manual, you might as well shoot manual--and Av doesn't count. As it is, DSLRs are finicky metering this old glass, so why would you want a 1" turn of your camera to the left or right dramatically changing your exposure? I want to meter on the appropriate area, hit my button, reframe, and it's locked in at that exposure.
I'll have to try this. I've not really known any other way than Av mode.

04-29-2010, 06:27 PM   #9
Ira
Inactive Account




Join Date: Mar 2009
Location: Coral Springs, FL
Photos: Gallery | Albums
Posts: 5,216
Remember--I'm talking about kx experiences here.
04-29-2010, 06:32 PM   #10
Ira
Inactive Account




Join Date: Mar 2009
Location: Coral Springs, FL
Photos: Gallery | Albums
Posts: 5,216
QuoteOriginally posted by fractal Quote
I always use Av mode with my Super Tak. I usually find myself at EV +2 also.

Considering screw mount lenses are MF, I don't think it would matter what setting you had your AF on.
So you're consistently adding two stops over. That's a LOT, and not the case with M mode.

I think you're right about the focus point setting, but since it's only working at a single point anyway, I figure I might as well set it for that.

Because it's not about the AF, but the confirmation, and I don't know how the sensor behaves differently with a manual lens on there. But again, it may make no difference at at all.
04-29-2010, 06:33 PM   #11
Site Supporter
SpecialK's Avatar

Join Date: Dec 2006
Location: So California
Photos: Gallery
Posts: 14,901
I have a couple T-mounts (one mirror, one "regular") and I shoot those in Av. The mirror lens is easy as it is one choice - f6.3. The other one requires a bit more thought, and stopping down (if desired) before metering, or shooting wide open at f8.

EV +2 sounds excessive, and I'm pretty sure lenses would vary.

Oh, if the K-x has manual focus confirmation beep and blink, you probably need to use the MF setting.
04-29-2010, 06:46 PM   #12
Veteran Member




Join Date: Nov 2008
Location: Melbourne
Photos: Gallery
Posts: 3,549
Well I gave it a go, hit the green button in 'M', makes a little noise & hey presto, it works

Chucks, i've been doing it wrong all this time

QuoteOriginally posted by SpecialK Quote
EV +2 sounds excessive, and I'm pretty sure lenses would vary.

Oh, if the K-x has manual focus confirmation beep and blink, you probably need to use the MF setting.
EV +2 Is necessary if shooting F5.6-16

I think the K-x has confirmation beep but not the red LED indicator in the VF.
04-29-2010, 08:12 PM   #13
Veteran Member




Join Date: Feb 2010
Location: NYC
Photos: Gallery
Posts: 1,071
I don't think the metering works in AV with M series lenses. It only works at the lowest aperture rating, so if I have an M lens 50mm f1.4, it's constantly metering at the f1.4 aperture, even if it's set at f11.

With Takumars, it should theoretically work in AV mode, but people here are saying otherwise. I'm a bit curious now, I'm going to try my Taks in a second.

Last edited by hangu; 04-29-2010 at 08:20 PM.
04-29-2010, 11:03 PM   #14
Inactive Account




Join Date: Aug 2008
Location: Michigan, USA
Photos: Gallery | Albums
Posts: 7,484
QuoteOriginally posted by fractal Quote
I always use Av mode with my Super Tak. I usually find myself at EV +2 also.

Considering screw mount lenses are MF, I don't think it would matter what setting you had your AF on.
Turn on the Catch In Focus option in your custom menu. Put your camera in AF-S and then you can use the Focus Trap.

04-29-2010, 11:36 PM   #15
Veteran Member




Join Date: Jul 2008
Location: Var, South of France
Photos: Albums
Posts: 1,071
I have several m42 and "converted PK-m" lenses, and Av mode works really well with those... Exposure is spot on, and pretty constant through the lens' whole aperture range.

By "converted PK-m", I mean I drilled a second locking hole into the lens, so it locks halfway (roughly 20 from the original lock position) and behaves just like a m42 preset lens (the aperture lever being not engaged by the camera actuator).
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
camera, dslr, k7, lenses, photography
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Screw Mount lenses on my PZ-10 eccs19 Pentax Film SLR Discussion 1 10-28-2009 08:28 AM
For Sale - Sold: Pentax SP500 Screw Mount Camera & Lens KmountShooter Sold Items 1 07-18-2009 12:02 PM
Trouble with screw Mount lenses golfing rob Troubleshooting and Beginner Help 12 04-13-2009 11:13 AM
screw mount lenses jbrowning Pentax SLR Lens Discussion 42 06-21-2008 10:02 AM
Pentax Screw-mount Cameras & Lenses Matthew Roberts Pentax Film SLR Discussion 7 04-21-2007 02:53 AM



All times are GMT -7. The time now is 05:00 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top