|
|
Post by Watcher3 on Sept 12, 2011 18:35:44 GMT -5
|
|
|
|
Post by mikey cee on Sept 13, 2011 0:35:28 GMT -5
Yeah....who the heck is Jurrian by the way?? Obviously a person who thinks outside the tube. ;D ;D
|
|
jfk
New Member
Posts: 2
|
Post by jfk on Sept 13, 2011 8:45:11 GMT -5
Hi Watcher,
I'm Jurrian, alias JFK and living in The Netherlands. I built this
bino one month ago. What are your questions about this bino ?
Please let me know, and I will try to answer them
|
|
|
|
Post by borispider on Sept 13, 2011 10:40:11 GMT -5
More pics, more specs, more details on 1st 2nd 3rd light reports.   |
|
|
|
Post by Watcher3 on Sept 13, 2011 12:29:05 GMT -5
I can barely make it out on my computer screen, but it looks like 150mm F/5 lenses? some details on the diagonal/focuser construction that a dummy like me might understand would be appreciated. Last but not least, how does it perform?
Awesome job by the way. Looks like we really attract some good talent here!
Joe
|
|
jfk
New Member
Posts: 2
|
Post by jfk on Sept 13, 2011 14:29:38 GMT -5
Hi Watcher,
Soon there will appear a review of this big binocular on the website of Istar optical. Ask Ales when he will publish it on the website ;D
Anyway, I will give you some details:
The objective lenses I have used are 150mm F5 achromats having
Strehl ratios of 0.90 and 0.88 respectively. The OTA consists
of high quality plywood, while the tripod is an old tripod of a
Celestron Nexstar 11GPS. The total weight of this instrument (inclusive eyepieces, tripod, finder) is 20 kg.
The performance at low magnification (max 62 x) is very good and at a magnification of 31 x gives excellent wide field views.
The TFOV at 31x magnification is 2.2 degrees.
With a UHC filter one could easily see NGC 7000 in a light polluted
backyard. I've also seen the faint merope nebula in the Pleiades.
I'm really satisfied and I'm sure I will discover much more faint fuzzies and dark nebula's in the milky way with this instrument
|
|
