All Forum Comments
Comment by malfis posted on SDM Problem with DA* 50-135mm at 15/09/2021 - 17:17
Whenever I try to use the above lens for the first time on any particular day it takes me ages to ‘wake up’ the SDM by constantly switching the camera on and off and trying to activate the autofocus.
Is it easily solvable or does it mean it’s a terminal problem with the lens, and if so approximately how much does a replacement SDM cost?
I’m loathe to ditch the lens as it’s a super copy.
Thank you.
Comment by malfis posted on SDM Problem with DA* 50-135mm at 14/09/2021 - 19:19
Thanks to Peter for a swift and pleasant transaction.
Comment by malfis posted on For sale: SMC-DA*300 f4 and DA converter at 14/09/2021 - 11:35
Sold, thanks Malfis. Mike, for the record it's the older flock type coating. Thank you.
The lens is exactly as described - in fine condition.
I’ve taken a few test shots, and it looks as if it is extremely sharp.
Thanks for an easy & pleasant transaction.
Comment by malfis posted on FS: Sigma 300mm 2.8 APO at 14/09/2021 - 09:06
Comment by malfis posted on For sale: SMC-DA*300 f4 and DA converter at 10/09/2021 - 20:45
Comment by malfis posted on WANTED - SIGMA APO 1.4 EX Teleconverter at 10/09/2021 - 20:44
Payment made with delivery early next week.
Comment by malfis posted on WANTED - Pentax 1.4x AW HD DA AF Rear Converter at 10/09/2021 - 20:43
Thanks once again Mike.
Comment by malfis posted on WANTED - Pentax 1.4x AW HD DA AF Rear Converter at 10/09/2021 - 19:10
Comment by malfis posted on WANTED - SIGMA APO 1.4 EX Teleconverter at 10/09/2021 - 18:41
If you have one gathering dust (not literally!) let me know.
Comment by malfis posted on WANTED - Pentax 1.4x AW HD DA AF Rear Converter at 10/09/2021 - 18:40
It's not terminal as both my 50-135mm and 16-50mm have done the same thing for years.
I have found (on the K-1 at least) that they wake up a lot quicker if you use liveview first. Alternative is to change them over to screw drive with a hack available on Pentaxforums.
Yes, my old 16-50 was notorious for this. My method was to have AF on, half press the shutter and manually turn the focus ring (quick-shift) to and from the extremes a few times. Lens would eventually wake up.
It went on for years like this and never failed entirely.
Yes, as above, rotate the focus ring through the whole range with the AF button pressed and the lens cap on.
Option 2 is to convert to screwdrive.
Option 3 is to remove the mount and rotate the motor manually with a screwdriver. This might have the effect of loosening the grease in the unit (theory)