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8x20 Are How Many ...mm?  
User currently offlineBoeingholiday From Austria, joined Apr 2002, 456 posts, RR: 4
Posted (12 years 3 weeks 2 days 19 hours ago) and read 1672 times:

Hello spotters,

yesterday I was sitting in the garten and while I was eating an aircraft flew over me. No extraordinary thing, but I was interested and took my binoculars to look what type it was. I used a 8x20, and the view was gigantic! A 747, lighted up by the sunset, with tremendous orange trails. Can somebody tell me how big the focal length must be to get the same size as from 8x20 binoculars? Thanks for your help, best regards Markus

7 replies: All unread, jump to last
 
User currently offlineLGW From , joined Dec 1969, posts, RR:
Reply 1, posted (12 years 3 weeks 2 days 17 hours ago) and read 1655 times:

400mm i think.

one funny think you say "yesterday I was sitting in the garten and while I was eating an aircraft flew over me" Big grin

LGW


User currently offlineJwenting From Netherlands, joined Apr 2001, 10213 posts, RR: 19
Reply 2, posted (12 years 3 weeks 2 days 17 hours ago) and read 1655 times:

8x magnification is approximately 400mm. 20mm frontlens is probably equivalent (never did the math to something like f/6.7 (give or take a stop).


I wish I were flying
User currently offlineBoeingholiday From Austria, joined Apr 2002, 456 posts, RR: 4
Reply 3, posted (12 years 3 weeks 2 days 15 hours ago) and read 1641 times:

LGW, have you ever heard something of a "table and chairs"?  Wink/being sarcastic
Thanks for the informations


User currently offlineLGW From , joined Dec 1969, posts, RR:
Reply 4, posted (12 years 3 weeks 2 days 15 hours ago) and read 1635 times:

Read what I pasted (the bold part in particular)

LGW


User currently offlineOlympus69 From Canada, joined Jun 2002, 1737 posts, RR: 7
Reply 5, posted (12 years 3 weeks 2 days 14 hours ago) and read 1626 times:

LGW, it's not nice to make fun of a person's punctuation - or lack thereof. Sad This is especially true when the person is a native of another country - see 'garten' which I believe is German for 'garden'  Smile

John.


User currently offlineLGW From , joined Dec 1969, posts, RR:
Reply 6, posted (12 years 3 weeks 2 days 14 hours ago) and read 1623 times:

Not making fun, just making the forum more light harted by providing a bit of light relief (or so i thought!)

I am sure most foreign people have better spelling and grammar than me and im english!!!

LGW (going back to skool)


User currently offlineBoeingholiday From Austria, joined Apr 2002, 456 posts, RR: 4
Reply 7, posted (12 years 3 weeks 2 days 11 hours ago) and read 1611 times:

LW, oh, now I understand  Wink/being sarcastic
No big deal. I was sitting.... and while I was eating (next part of the sentence), an aircraft... Big grin  Smile/happy/getting dizzy best regards


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