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12-23-2009, 02:58 PM   #1
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Is there a 1/5 sec limitation with manual lens on K200D?

I've just got my M 50mm 1.7, but green button won't give longer times more than 1/5 second, is there such a limitation?

My setup is below in short:
-SR on
-When my K200D turned on I select 50mm.
-Green button setting adjusted to "Program Line" on the menu
-MF switch selected
-Aperture setting selected to "allowed" on the menu.
- Exposure mode is always M mode (not (Av)
-When I push green button I never get exposure time longer than 1/5 sec.
- I can go with longer times when I adjust time with dial ring but still green button doesn't measure exposure time no longer than 1/5 secs.

Since my understainding is true Av mode is not allowing aperture control, taking pictures wide open all the time with M lens, can anyone confirm this please.


Last edited by cbaytan; 12-23-2009 at 04:03 PM. Reason: add info
12-24-2009, 09:10 PM   #2
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There isn't a limit on the shutter speed in thatsense, but there is a lower limit to how much light the meter needs to give reasonable results. If light is low and you are stopping down, you might be below that limit.
12-25-2009, 03:51 PM   #3
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Even I put the lens cap on, it gives no more time than 1/5sec, more importantly I guess an M lens short the body contacts, would it be harmful to body and even to batteries?
12-25-2009, 04:11 PM   #4
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Try reset camera setting.

12-25-2009, 04:14 PM   #5
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QuoteOriginally posted by winglik Quote
Try reset camera setting.
I use it at M mode. You mean M mode wouldn't harm the camera electronics while M lens shorting all the pins?
12-25-2009, 05:20 PM   #6
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I can't answer your green button question but I use manual lenses with my K100D (predecessor to K200D) often. The camera doesn't care if the contacts are shorted. Pentax promises backward compatibility, they would not make a camera which can't be shorted by old lenses. I often do exposures of 30 seconds in M mode and 1-2 minutes in B mode.
12-25-2009, 09:34 PM   #7
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QuoteOriginally posted by cbaytan Quote
Even I put the lens cap on, it gives no more time than 1/5sec
Well, like I said, there is a lower limit to how much light the meter needs to work with. You were below that limit before; putting the lens cap on just made it worse!
12-26-2009, 02:32 AM   #8
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There is a 1/5sec limitation with M42 lenses too, but I can compansate EV with wheel though.

1st pic: M 50mm 1.7 @f/8 (FA 35-80 behind)

2nd pic Flektogon 35mm 2.8 @f/8

3rd pic M 50 1.7 again @ f/8

Attachments showing up here not good as I created links to those photos from an external link. I didn't figured that out why, yet.

Attached Images
     
12-26-2009, 03:31 AM   #9
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Please compare the second picture with below pic. They are the same picture. Above pic is attached, this picture is given an external link


12-26-2009, 06:00 AM   #10
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I use my K200 with manual lenses and M42 all the time with no problem. I get shutter speeds that fit the shooting scene until the light falls below meter's ability to measure.

Manual lenses will not harm the camera, the electronics are designed for their use.

What ISO are you shooting at?
12-27-2009, 12:20 AM   #11
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I am a strict 100 ISO shooter in real life, but for trying out lenses at night I set it to 1600 ISO above pictures all 1600 ISO.

Another problem is I attached a off camera flash shoe cord (Chinese Nicna brand) , to use my macro ring flash (old Starblitz 1000 Macro), after I measure light (with green button) when I shoot flash fires, but if I compensate the EV, with wheel after measuring light, flash doesn't fire. Is there a way to make flash on cord fire even I compensate the EV, in the custom menu?
12-27-2009, 07:59 AM   #12
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The camera has no way of controlling that flash. The only control is the auto setting on the flash. It doesn't have the contacts to communicate with the camera.
12-28-2009, 09:05 PM   #13
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QuoteOriginally posted by cbaytan Quote
There is a 1/5sec limitation with M42 lenses too, but I can compansate EV with wheel though.
As you can with all lenses. I'm not understanding the problem you are describing. Yes, if light levels are extraordinarily low, the meter won't work, and you have to set exposure by trial and error. It's that way with all lenses, but more noticeable when attempting to meter stopped down (as happens with all manual exposure lenses, K-mount or M42), because they throw away some of whatever little light is present.

I have no idea what your pictures are trying to demonstrate or how they relate to any of this.
12-28-2009, 09:32 PM   #14
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I guess when light is unmeasurable by the camera 1/5sec is given as default. Trial/error method of course works for me.

Pictures are not directly related to subject, they are just a proof of I can take pictures with M and M42 lenses (my very firsts, you know).

Thanks Mark, merry Christmas and a new year to all.
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