Metering issue with kenko 1.5x shq & DA 300mm

Stargeezer · 04-22-2010, 01:04 PM

When I use the teleconverter on my k-x with the 300mm f4 it under exposes.
I tried with the sigma ex 105 and same thing
using av mode at f-4 or any focal ratio.
I tried using the meter in manual mode but still under exposes. Is this normal

Is there a way to tell the camera I am using a tc.

whats up??
Joe

Adam · 04-22-2010, 02:35 PM

Try using +.5 or +1 EV. Some TCs do tend to trick the metering system a bit.

Ira · 04-22-2010, 03:01 PM

What's your metering pattern set to? Multi?

Try center weighted, or even play with SPOT.

Stargeezer · 04-22-2010, 06:17 PM

I have it on spot. I was in the woods taking pictures in the shade with back lighting.
I will try segment metering tomorrow under the same conditions and see if that helps.

The subject was an owl with white spots , that might have helped also.

Though I did not have much variation in exposure without the tc.

I will see if I can post a picture/
Thanks Joe

Stargeezer · 04-22-2010, 06:37 PM

Here is an example

Stargeezer · 04-23-2010, 06:28 PM

OK I tried again today. I used segment metering and no problems at all. I try spot metering and no problems again. Huh? Yesterday I took 30 shots and could not get proper exposure.

My thinking is either dirty contacts or the teleconverter is a little touchy for making contact!!
Joe

04-22-2010, 01:04 PM	#1
Stargeezer Senior Member Join Date: Nov 2009 Location: sunny florida Photos: Gallery \| Albums Posts: 128	Metering issue with kenko 1.5x shq & DA 300mm When I use the teleconverter on my k-x with the 300mm f4 it under exposes. I tried with the sigma ex 105 and same thing using av mode at f-4 or any focal ratio. I tried using the meter in manual mode but still under exposes. Is this normal Is there a way to tell the camera I am using a tc. whats up?? Joe

04-22-2010, 02:35 PM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	Try using +.5 or +1 EV. Some TCs do tend to trick the metering system a bit. Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

04-22-2010, 06:37 PM	#5
Stargeezer Senior Member Join Date: Nov 2009 Location: sunny florida Photos: Gallery \| Albums Posts: 128 Original Poster	Here is an example Attached Images

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04-22-2010, 03:01 PM	#3
Ira Inactive Account Join Date: Mar 2009 Location: Coral Springs, FL Photos: Gallery \| Albums Posts: 5,216	What's your metering pattern set to? Multi? Try center weighted, or even play with SPOT.

04-22-2010, 06:17 PM	#4
Stargeezer Senior Member Join Date: Nov 2009 Location: sunny florida Photos: Gallery \| Albums Posts: 128 Original Poster	I have it on spot. I was in the woods taking pictures in the shade with back lighting. I will try segment metering tomorrow under the same conditions and see if that helps. The subject was an owl with white spots , that might have helped also. Though I did not have much variation in exposure without the tc. I will see if I can post a picture/ Thanks Joe

04-23-2010, 06:28 PM	#6
Stargeezer Senior Member Join Date: Nov 2009 Location: sunny florida Photos: Gallery \| Albums Posts: 128 Original Poster	OK I tried again today. I used segment metering and no problems at all. I try spot metering and no problems again. Huh? Yesterday I took 30 shots and could not get proper exposure. My thinking is either dirty contacts or the teleconverter is a little touchy for making contact!! Joe