Exfso
22-04-2005, 02:51 PM
I found this reply to a guy in the yahoo toucam groups, in relation to a problem he was having with grainy results when imaging. I thought it was worth posting, someone may find it useful.
First of all, consider your local seeing conditions. This can make a
huge difference in itself from night to night. Are you watching a
clearsky clock for your locality?
1) Are you using an IR filter? Image will be grainier WITH an IR
filter than without.
2) Are you using a higher frame rate? 5 fps will give you best looking
frames, 10 will give you more frames but lower quality within your
time limit window 15 and up are too compressed and will suffer.
3) Jupiter's rotation is FAST (under 10 hours) so you'll end up with
smears in place of details if you image for more than 60-90 seconds.
4) Use a lower gain with a longer exposure as opposed to a higher gain
with a short exposure. This will lower your noise and grainy appearance.
5) try to peg the brightness meter at around 120 or so
:confused: :astron:
First of all, consider your local seeing conditions. This can make a
huge difference in itself from night to night. Are you watching a
clearsky clock for your locality?
1) Are you using an IR filter? Image will be grainier WITH an IR
filter than without.
2) Are you using a higher frame rate? 5 fps will give you best looking
frames, 10 will give you more frames but lower quality within your
time limit window 15 and up are too compressed and will suffer.
3) Jupiter's rotation is FAST (under 10 hours) so you'll end up with
smears in place of details if you image for more than 60-90 seconds.
4) Use a lower gain with a longer exposure as opposed to a higher gain
with a short exposure. This will lower your noise and grainy appearance.
5) try to peg the brightness meter at around 120 or so
:confused: :astron: