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thank you - so I'm using the first option
Comment by brenski posted on K-3 II Astrotracer Weirdness at 28/03/2023 - 13:02
Spad wrote:
It might be worth using Mirror Lock Up. This can help to reduce shutter shake. Especially on longer focal length lenses.
I use it a lot for shooting when my camera is attached to a telescope.
there's two optionsIt might be worth using Mirror Lock Up. This can help to reduce shutter shake. Especially on longer focal length lenses.
I use it a lot for shooting when my camera is attached to a telescope.
MUP
and
MUp with a little "symbol"
Comment by brenski posted on K-3 II Astrotracer Weirdness at 28/03/2023 - 12:16
cheers
Comment by brenski posted on K-3 II Astrotracer Weirdness at 28/03/2023 - 11:56
Spad wrote:
Yes... where you have the four control buttons surround the circular button. The top middle one above ok.
These are your shooting modes. Multi Exposure is on the right.
I'm thinking this has something to do with Multi-Exp Mode and Interval Shooting. Is there a way to completely disable both. At present M/Exp is set to "sunlight" and "3" - I cannot find a way to disable this completely. Yes... where you have the four control buttons surround the circular button. The top middle one above ok.
These are your shooting modes. Multi Exposure is on the right.
Self Timer = 2s,
Mirror Lockup = is on
Comment by brenski posted on K-3 II Astrotracer Weirdness at 28/03/2023 - 11:03
yep, using a wired shutter release
my feeling exactly - it looks like a double-exposure - is there a Pentax menu setting that does this?
the moon image is fine - so shorter exp definitely works fine
my feeling exactly - it looks like a double-exposure - is there a Pentax menu setting that does this?
the moon image is fine - so shorter exp definitely works fine
Comment by brenski posted on K-3 II Astrotracer Weirdness at 28/03/2023 - 10:04
hi Gary, all is very steady.
Not really a lowish angle - just very close to the house!
I've been told elsewhere that it could be that I need to tell the camera that the 200mm takumar is 300mm (crop factor)? will try that, but can;t see how it creates "double stars"
Not really a lowish angle - just very close to the house!
I've been told elsewhere that it could be that I need to tell the camera that the 200mm takumar is 300mm (crop factor)? will try that, but can;t see how it creates "double stars"
Comment by brenski posted on K-3 II Astrotracer Weirdness at 28/03/2023 - 07:39
hi, yes, correctly calibrated. no, didn;t bump/catch the tripod (catching/bumping the tripod would result in a "line" between each "double-star"?
this is almost as if it captured the whole image twice - it's like a double-exposure?
this is almost as if it captured the whole image twice - it's like a double-exposure?
Comment by brenski posted on K-3 II Astrotracer Weirdness at 28/03/2023 - 07:13
really hoping someone can help with this: K-3II with Asahi Takumar SMC 200mm F/4 lens. so, calibration "appeared to have gone well", but the resultant image [F/4, iso800, 20sec] appears to have "doubled" every star in the image. strange though, because I next took a quick capture of the Moon [F/22, iso100, 0.7sec] appears nicely in focus. I used a Bahtinov to get focus for the first star image!
and, a crop of the first image:
and, a crop of the first image:
Comment by brenski posted on K-3 II Astrotracer Weirdness at 27/03/2023 - 22:41
