The difference in resolution is only applicable to Lunar work, and even then, you don't get any more detail, you just fit more of the moon in each shot.
The chip is larger from memory in the DBK31 so the image for planets takes up less space on the chip, so you don't get any extra resolution anyway.
The slower frame rate and lower sensitivity will really make your planetary images suffer though.
I'd get the new 618, and save up for a DBK41 or DMK41 for the moon in the future, and shoot mosaics of the moon with the DBK21AU618 in the meantime.You will get the same level of detail.
-Peter
Quote:
Originally Posted by EricB
Hi everyone!
I have saved hard in the past few months and I am now in a position to buy an Imaging Source DBK camera.
I have been thinking about getting the DBK 21AU618.AS (the one with the new chip at $499 -Bintel). The camera has a resolution of 640 x 480 and can process 60 frame per minute.
However, my budget could strech to $599, and I am wondering whether it would be better then to get either:
- the DBK 31AU03.AS with a resolution of 1024 x 768 and 30 frames maximum per minute
or even
- the DBK 41AU02.AS with a resolution of 1280 x 960 and only 15 frames maximum per minute
At this stage, I am only interested in lunar and planetary AP. I have a 10" SW GOTO.
Is the difference in resolution noticeble? Is it worth the extra $100? Would a lower frame rate be detrimental to lunar and planetary photography? Would any of these camera be suitable to DSO photography when I upgrade my telescope down the track?
Your advice would be greatly appreciated.
Cheers,
Eric
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