All Forum Comments
Comment by blende8 posted on In the move from film to digital ... at 14/02/2007 - 11:22
We are talking lenses over 20 years old if we go pre-A and we can't expect total compatibility for ever can we?
It's only the K10D that has this specific Problem.
Comment by blende8 posted on K10D Stop down metering exposure problem at 19/02/2007 - 09:11
Just out of interest, how does one find out that 'Pentax is aware' of something like this?
I wouldn't hold my breath though that something will change for the K10. It is quite possible that this requires changes in the hardware. Perhaps in a future model. But I am not sure.
I will keep at it. Let's wait and see ...
Comment by blende8 posted on K10D Stop down metering exposure problem at 14/02/2007 - 12:48
That said, I wonder if you get the same results from manual stop down metering (rather than using the green button)? What if you actually wind down the aperture by hand and meter it? Is it more accurate then?
You can test this either with M42 lenses or by stopping down using the optical preview.
The metering system simply reacts strange on stopped down lenses.
Currently the preferred theory is that it has to do with the light transmission through the screen.
Two cases have been reported that the problem goes away if you use an istDs screen. Unfortunately I don't have one anymore.
Comment by blende8 posted on K10D Stop down metering exposure problem at 13/02/2007 - 09:25
I agree it is a disapointment. Pentax is aware of the problem, but no solution yet. It has been suggested that the kind of screen has to do with it.
For your reading pleasure, start here for example:
http://forums.dpreview.com/forums/readflat.asp?forum=1036&thread=21084008&page=1
http://forums.dpreview.com/forums/readflat.asp?forum=1036&thread=21102647&page=1
Comment by blende8 posted on K10D Stop down metering exposure problem at 12/02/2007 - 20:23
- with the lens wide open, the resulting shot is quite a bit over exposed
- stopped right down it's very underexposed
- at F11 it's about right.
But normaly it is the other way round.
Wide opn it is about ok, but from about f4 it gets overexposed by about 2 stops. At least with me and what I have heard so far.
Comment by blende8 posted on K10D Stop down metering exposure problem at 12/02/2007 - 16:20
If you are using a program mode and have to press buttons to adjust EC, wouldn't you be better off using manual?
It is easier to dial this in only once and then work with the automatics than to use M all the time.
Comment by blende8 posted on exposure compensation at 12/02/2007 - 11:35
Comment by blende8 posted on AF teleconverters at 07/02/2007 - 16:38
Has Pentax released a 2x teleconverter that is compatible with AF lenses ?
There is an 1.7 one though.
Also there is a very good Kenko AF-Konverter 2x DG MC 7.
Comment by blende8 posted on AF teleconverters at 07/02/2007 - 15:18
Perhaps the SSM is the reason the Pentax versions aren't out yet? taking some fine tuning perhaps?
Comment by blende8 posted on Heads up: Tokina AT-X 535 50-135 f2.8 at 07/02/2007 - 14:46
Has my 50mm f1:1.4 effectively become a 75mm f1:1.4 because of the crop factor?