SV F60M2 Finder Scope
Posted 09 December 2012 - 10:52 AM
The thing I am most concerned about is, are the stars at the edge of FOV in sharp focus like the center? Or, is there any issue here because the scope is a fast F/3.75?
And what was the faintest magnitude you were able to see? Is the brightness level of the scope adaquate, because it uses a prisim instead of a diagonal?
Posted 09 December 2012 - 11:22 AM
I use an SV60 finder on my 80mm scope for observing rather than finding. Long story short... with orthos. I tried a number of wide field EPs, including a 19mm Panoptic and was disappointed with the edge of field performance. The performance of this scope and the orthos came as a surprise to me, very clean across the whole field. At present it contains an 18mm BGO + a Baader M&SG filter that basically lives there. The filter helps to tame the background a bit at these exit pupils. Brightness is not an issue. I used this setup last night to observe the entire sword of Orion and have used a 25mm UO Abbe with an OIII filter to see the entire Veil nebula. Just a technical note: The UO orthos in 18 and 25mm FLs will need a bit of help to come to focus. I use parfocalizing rings to accomplish this. This isn't necessary with the BGO or any of the other UOs. I'm uncertain of the limiting magnitude but it should be comparable to any 60mm binoculars.
Posted 09 December 2012 - 11:50 AM
But, on ebay, Russel Optics sells a 60mm binocular part with the exact same lens diam., same f/L, same thickness, same blackened edge......BUT this one performs like you had hoped the overpriced S.V. shoulda.
Sure you gotta cut the lens outta the housing, all glued together, but it is worth it at $24.95 to salvage this 60mm mess.
Posted 09 December 2012 - 12:03 PM
Posted 09 December 2012 - 12:29 PM
I had the SV50 in white and it looked and worked, basically "ok", but did think the image was a tad on the dark side. Guesss I'm used to ED glass!
Desertlens, I can hardly follow what you are saying about the UO eyepieces and filters you mention, but will study this a bit more before getting any finder. And, that is ONE sharp looking rig! I'm not grining, just jealous!
Tomharri, How DID you figure that out, with swapping lenses! Not bad! I like to tinker, but, oh man!
Almost looks like the Orion 9x50 RACI finder #7020 for $130 might just save the day!
Posted 09 December 2012 - 01:15 PM
Posted 09 December 2012 - 06:22 PM
Posted 10 December 2012 - 12:22 AM
Posted 10 December 2012 - 01:00 AM
Posted 10 December 2012 - 05:52 PM
This is the info I was sort of hopeing for! If I get this scope, I might just be allowed to join the venerable, "60mm Club"!
Best to you ALL
Posted 10 February 2013 - 10:24 AM
Posted 10 February 2013 - 12:44 PM