|
Post by mikey cee on Nov 5, 2012 11:05:44 GMT -5
Several nights ago I easily split 72 Pegasi. The Burnhams handbook states a seperation of only .5 sec. I observed the star high overhead near the meridian. My 10" f/11 R30 handled it quite easily at 625x and 815x. The clean black void between the componets was estimated to be just as wide as the airy discs were in diameter!! I can't recall the exact specs on an aperture of this level but believe it to be about .465 arc sec. I'm hopefull that the new Raycorrs will allow a "cleaner" split although I'm sure that less than perfect seeing conditions were fighting me that night. Jupiter was high in the east about half way to the meridian also. So I rolled over to it and was tongue tied....something of a rarity for me IMOH. ;D Even with a Moon and cirrus in the sky Jupiter shown brightly. I have seen skies much better than tonight and I can't contain my eagerness. Istar's lens is really living up to it's "hype" which is a pleasant experience. Mike
|
|
|
Post by mikey cee on Nov 19, 2012 23:39:24 GMT -5
It's been several nights since posting the original thread here. I just finished observing 72 Pegasi again for about an hour. Im getting bored. I knew this was going to happen with this lens sooner or later. At this rate there won't be any challenges left. Even in less than ideal conditions I can detect two stars. Of course only in fleeting moments of shimmering air pockets can I do this. The other night I tried 10 Arietis and it to was a snap. It is a 5.5 mag primary with an 8.5 secondary. Some places say it to is .5" others say 1.1". Two nights ago the E&F stars of the Trapezium shown easily even in this urban sky. The trouble I've noted with this lens is that the spot size is so damn small that these star's airy discs are almost too small as a result. I guess one must be carefull in what one asks for! Well I can't wait for Jupiter. There a few clouds in the way but I'm hoping for a clear area out west to move in after bit. ::)Mike
|
|
|
Post by Ales - iStar Optical on Nov 20, 2012 5:35:19 GMT -5
Mike, I wish from bottom of my heart that every single ISTAR customer would get bored the same way you do.... Yes, we struggle to offer the best lenses for money, super small spot size, and ...some of these lenses are simply too good for one's taste. Enjoy whats left in the sky.. (still plenty..) and if you get too bored.. lets think about designing and producing a 280 F11 R30... and hell, if I find the glass lets go for 300 F11 R30. By the way, check our my next post about the new truss construction scope now in final prototype development stages. Can you imagine most 180mm to 250mm scope being produced this way? Well... I CAN.. The weight is what matters most.. and we took this chalenge seriously. How these perform side to side with fully closed tube design will be known soon.. say February 2013.. be well my friend and keep posting, cheers, Ales
|
|
|
Post by bn1777 on Dec 24, 2012 23:37:06 GMT -5
BORED ? Mike there are 100's of thousands of double stars that will keep on testing you beautiful scope for years , and if you loose intrest all together ,, well you can give the scope to me ?? if you want ?? Great report mate . Brian.
|
|