My asto buddy has the Canon 10X30 and 18X50 IS. Since we work in the same company I have had many opportunities to borrow both for extended evaluation. I used the 10X30 for about two weeks last year. I was quite impressed with the performance. It has very good resolution and edge sharpness and it did seem to gather more light the a typical 30mm bino. If fact, I had my Oberwerk 12X60 with me at dusk one evening and the Canon 10X30 IS seem to be able to match the resolution of the much larger bino at low light.(I was reading a neighbor's license tag ~100 yds away) I also feel the 10X30 is much more reasonably priced than the bigger IS binos from Canon. I did not purchase a pair of 10X30 IS because I feel comfortable handholding 10-12X binos. I prefer more compact package of a conventional roof prism bino in the 8-10X range. Just purchsed a pair of 8X32 RF/WP/PC binos last month. I may get a pair of 12X50s next.
I was less impressed with the 18X80 IS for astronomy because of the slight image jitter. Stars do not stay pin points even when the IS bino is mounted. I prerfer to use my 20X80 LW with a tripod for astromy. My Burgess LW and the excellent Bogen 3221WN/501 fluid head combo cost less than $500.... about 1/2 the price of the Canon 18X50 IS.
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Re: 10x30 Canon IS binoculars
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