Something expensive is broken...

whelmed
Posted 15/08/2010 - 16:39 Link
So I just bought a 70-200mm from a fellow forumer and it was lovely for the last few weeks. I took it out for my first big outing which was taking shots of my wifes football match. I had my 1.4x TC on as I wanted that bit more range and I found it a tad bit slow focussing. When I moved around to get a better location to shoot from I took off the 1.4x TC and tried to use it without the TC and focus didn't work. I could 'assist' the focus and it would move but it wouldn't focus on its own. When I put the TC back on it worked but a tad bit slower.

I tried a 18-50mm and a 10-20mm and both were normal focusing speed. So I'm left wondering one of three things.

1) Is the lens fuct? Other lenses work so it could be this...
2) Is the camera fuct? When a TC is on it works ... maybe the motor is starting to lack the uumph?
3) Is there something else which might be a problem?

Any suggestions would be appreciated. I may go to pcworld and see if the lens works on a k7/K-x
K-5; Siggy 10-20 f4, 30mm f1.4, 18-50mm f2.8, 70-200mm f2.8; Tammy 400mm f4, 500mm f8
Don
Posted 15/08/2010 - 17:55 Link
clean the contacts on the lens?
Fired many shots. Didn't kill anything.
matwhittington
Posted 15/08/2010 - 20:37 Link
Second that - whenever I have had such issues they have been resolved with a wipe of all the contacts...

Regards
Mat W

My Flickr: link
greynolds999
Posted 15/08/2010 - 22:27 Link
Also check you have the latest firmware on the camera.
whelmed
Posted 15/08/2010 - 22:40 Link
I've got the latest firmware, but cleaning the contacts fixed it. How weird! Thanks guys - option 3 it was!

Man, with this new job I've got the time to take photos has really really shrunk. Hope I can find time in the next few weeks!
K-5; Siggy 10-20 f4, 30mm f1.4, 18-50mm f2.8, 70-200mm f2.8; Tammy 400mm f4, 500mm f8
Pwynnej
Posted 16/08/2010 - 08:47 Link
Glad it's ok whelmed
Z-1p, K-1, P50
F50 1.7. SMC-FAs 24, 35, 50 1.4, 85, 135. HD-FA15-30, DFA24-70, D-FA*70-200. The SMC-FA Limited Trinity.
Metz 45 CL-4, AF500FTZ. AF540FGZ.
Some Mamiya and some Nikon, and a Canon T70.
thoughton
Posted 16/08/2010 - 10:34 Link
Me too Whelmed, as you know I'm now interested in any potential problems with the 70-200. Did you manage to find an old non macro Sigma in the end?
Tim
AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
MF - Vivitar CF 28/2.8, Tamron AD2 90/2.5, MTO 1000/11
Stuff - Metz 58 AF1, Cactus v4, Nikon SB24, Raynox 150, Sigma 1.4x TC, Sigma 2x TC, Kenko 2x macro TC, Redsnapper 283 tripod, iMac 27”, Macbook Pro 17”, iPad, iPhone 3G
FlickrFluidrPPGStreetPortfolio site
Feel free to edit any of my posted photos! If I post a photo for critique, I want brutal honesty. If you don't like it, please say so and tell me why!
Pwynnej
Posted 16/08/2010 - 11:41 Link
He bought my old one Tim, so when I read the first post it was squeaky bottom time

Last thing any vendor wants to know that their old equipment soon starts misbehaving.
Z-1p, K-1, P50
F50 1.7. SMC-FAs 24, 35, 50 1.4, 85, 135. HD-FA15-30, DFA24-70, D-FA*70-200. The SMC-FA Limited Trinity.
Metz 45 CL-4, AF500FTZ. AF540FGZ.
Some Mamiya and some Nikon, and a Canon T70.

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