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Comment by George Lazarette posted on Metering with 1.7X converter at 15/07/2007 - 17:06
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Comment by George Lazarette posted on Metering with 1.7X converter at 15/07/2007 - 14:30
I have also noticed that in AV mode I can set the F to F2.8 but the lens is only a F4 if I take a shot at F2.8 the shots come out over exposed.
Has anyone else had the same problems and has anyone any ideas why this could be happening?
What do you think I should do George? I thought I might try cleaning the contacts.
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Comment by George Lazarette posted on Metering with 1.7X converter at 15/07/2007 - 12:58
Ok, 'twas just a thought.
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Comment by George Lazarette posted on Metering with 1.7X converter at 14/07/2007 - 22:23
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Comment by George Lazarette posted on Metering with 1.7X converter at 14/07/2007 - 20:06
Does the teleconverter have all the relevant contacts?
I have just put an FA zoom on my K10D, with the 1.7 TC and everything works perfectly. The zoom has a widest aperture of 1:4, and the body would not open wider than 1:8. With a 1:1.8 lens, the widest allowed aperture was 1:2.8. Note that this represents the combined aperture of the lens and the TC.
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Comment by George Lazarette posted on Metering with 1.7X converter at 14/07/2007 - 19:53
I have also noticed that in AV mode I can set the F to F2.8 but the lens is only a F4 if I take a shot at F2.8 the shots come out over exposed.
Has anyone else had the same problems and has anyone any ideas why this could be happening?
G
Comment by George Lazarette posted on Metering with 1.7X converter at 14/07/2007 - 19:19
Sorry it is a bit difficult to explain.
What I meant was when I use Aperture Priority mode I can set the aperture to 2.8 on the camera but the lens is only a F4 lens.
I was only using the ring on the lens to prove a point why do I get two different meter readings for F4 surely they should be the same.
I suspect that either you have a fault somewhere, or dirty contacts. Try cleaning all the lens-mount contacts on each item. This can often be a cause of exposure errors.
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Comment by George Lazarette posted on Metering with 1.7X converter at 14/07/2007 - 18:42
I am having problems with the metering on my K10D with a Sigma 100-300 EX F4 lens and Pentax 1.7X converter.
I have taken some test shots and found the following:-
With the camera set to AV and lens in A position at F4 the camera meters at 1/80th second.
With the camera set to M and lens at F4 using the ring the camera meters at 1/320th second.
Both shots were correctly exposed.
I have also noticed that in AV mode I can set the F to F2.8 but the lens is only a F4 if I take a shot at F2.8 the shots come out over exposed.
Has anyone else had the same problems and has anyone any ideas why this could be happening?
G
Comment by George Lazarette posted on Metering with 1.7X converter at 14/07/2007 - 17:48
... and continuing with your right on the stick? Or do you swap to your left hand on the stick? Or will it fly in trim while you take the picture conventionally with both hands on the camera?
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Comment by George Lazarette posted on Pictures of Tucuman, Argentina mountains… at 15/07/2007 - 22:27
It's even got power-zoom contacts, which is more than mine has. Get out that brillo-pad and get scrubbing.
Edit... in fact, I thought I'd just get on with it. It's much better now. Thanks for your help...
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