Smallest useful "bins"

Smallest useful "bins"

Postby philip pugh » Fri Feb 26, 2010 6:36 pm

I bought a pair of 8x21s for £3.99 from Morrissons. I can just about split Albireo with them and can see quite a few Hyades and Pleiades.

My dad was left some good quality 7x30s by his dad and they're rather good, showing M31 very clearly.
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RE: Smallest useful "bins"

Postby binman » Fri Feb 26, 2010 6:53 pm

7x35's are often over looked and can give bright really wide field views
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RE: Smallest useful "bins"

Postby sftonkin » Fri Feb 26, 2010 7:10 pm

My sister has an old (uncoated) Carl Zeiss Jena 8x30 binoc -- it is superb on the stars -- incredibly crisp snap-to-focus, almost to the edge of field.
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RE: Smallest useful "bins"

Postby brianb » Fri Feb 26, 2010 8:33 pm

I know I have a reputation for "big (and expensive) is beautiful" so I thought I'd show off an instrument I use regularly.

Image

Russian 4x20 porro prism binoculars, bought new in 1975 for £4.95. 35 years of use have not caused any issues, the collimation is still spot on. Star images are sharp & symmetrical, except near the edge of the field. The Russians were desperate for foreign exchange at the time, but honestly these would have been a bargain at 10x the price.

Does not have a tripod mounting bush, but at 4x doesn't really need one.

This tiny instrument has a wide, flat field and is ideal for visual estimates of variable stars between magnitudes 4 & 6. Much, much better than the cheap, poor quality Chinese 8x21 & 10x25 roof prism instruments which are all too common these days.

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