All Forum Comments
Comment by loskeran posted on SDM Lenses at 03/10/2009 - 09:44
As for your problem, it's quite normal and it's called haunting.
Comment by loskeran posted on SDM issues? A straw poll. at 01/10/2009 - 10:01
My 50-135 and a 60-250.
50-135 fell apart inside, and the 60-250 had focusing issues
If so, were either of these SDM failures? Because it doesn't sound like it.
I acknowledge that there are other issues, but I'm trying to keep a very narrow focus on the poll so we can identify only SDM failures, I trust you don't mind?
Basically as I understand it Pentax are using a "micro" motor similar to many other makes ie Tamron but with the weather sealing, it is very under powered, making it slow and prone to failure.
The sooner the motors are uprated the faster the lenses will be.
Comment by loskeran posted on SDM issues? A straw poll. at 29/09/2009 - 12:26
My 50-135 and a 60-250.
50-135 fell apart inside, and the 60-250 had focusing issues
You are probably the unluckiest person I have ever come across.
Comment by loskeran posted on SDM issues? A straw poll. at 28/09/2009 - 21:24
50-135 fell apart inside, and the 60-250 had focusing issues
Comment by loskeran posted on SDM issues? A straw poll. at 28/09/2009 - 19:23
I have only used it twice so it has to go.
G
Let someone else get the benefit of it at a reduced price, is that logical enough for you?
Comment by loskeran posted on Sigma /Pentax EM140 flash at 21/08/2009 - 17:14
Comment by loskeran posted on Sigma /Pentax EM140 flash at 21/08/2009 - 16:07
Any offers of £225 inc post for UK, Europe etc at cost.
Comment by loskeran posted on Sigma /Pentax EM140 flash at 21/08/2009 - 15:25
Slightly off topic but for what it's worth in the Pentax-Nikon-Canon debate the following might be of interest.
Durham Photographic Society was given a free hand last night(Thursday) to take pictures after hours inside Durham Cathedral.
More than 30 members turned up and while the majority were sporting Canons I gained the distinct impression there were quite a lot more Pentaxes than Nikons on parade.
david
Comment by loskeran posted on AP K-7 Review at 14/08/2009 - 14:38
But, to be fair to her, I guess she was only reviewing the kit that was supplied.
To my mind I rather think Pentax knew the other manufacturer (who’s name would cause some to Cross themselves) with a similar system of in camera video and a mike socket for the stereo sound, and rushed it far to quickly trying to beat the competition, in doing so have (cocked it up).
There have been firmware updates and I rather think there will be many more.
Comment by loskeran posted on AP K-7 Review at 14/08/2009 - 09:46
Chris, SDM means Super Direct-drive Motor (ultrasonic autofocus)
Its supposed to be fast and silent when focusing at least on the digital bodies.
USM they are not, (Ultra sonic motors) Canons "ring motors" very fast, the same as Sigma’s HSM, "Hyper sonic motors"
SDM, as I understand it is for "Silent drive motor" a micro motor similar to the Tamron version, the only very fast drives at the moment are of the ring type.
And yes you also require very fast AF to go with it, i.e. the newest Canon version on their 7D, so Pentax does have to make lots of improvements yet.