Ideal F ratio for dobsonion | Astrobiscuit | Page 1

elder ruin Dec 8, 2022, 4:49 PM

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What will be ideal f ratio for 6 or 8 inch dobs. I want to see planets, moon and DSO with good clarity? Could you please suggest some good 6 or 8 inch dobs as well?

leaden remnant Dec 8, 2022, 4:57 PM

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usually 8" dobs are f/6 with 1200mm of fl, most of them are pretty much the same in terms of quality so just look for the cheapest one

elder ruin Dec 8, 2022, 5:44 PM

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Thanks @leaden remnant

glossy mirage Dec 8, 2022, 6:06 PM

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8" 1200mm yeah

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Don't think lower mm exists

elder ruin Dec 9, 2022, 6:12 AM

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Thanks @glossy mirage

signal bear Dec 9, 2022, 8:31 AM

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I'd go for an f5 dob @elder ruin

signal bear Dec 9, 2022, 8:31 AM

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glossy mirage Don't think lower mm exists

there is 1000mm

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200/1000

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and 150/750

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f/5 superiority

glossy mirage Dec 9, 2022, 12:22 PM

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signal bear 200/1000

Dob?

elder ruin Dec 9, 2022, 12:22 PM

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signal bear I'd go for an f5 dob <@596003194862043144>

Thanks @signal bear

elder ruin Dec 9, 2022, 12:22 PM

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glossy mirage Dob?

dobsonian

glossy mirage Dec 9, 2022, 12:23 PM

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elder ruin dobsonian

Didn't find one

signal bear Dec 9, 2022, 1:02 PM

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glossy mirage Didn't find one

make a dob base for a 200pds and its done

#Ideal F ratio for dobsonion