My binocular collection Binoculars by date of addition Binoculars in Alphabetical order
So this cabbie says: "Know who I had in this cab last week? Bertrand Russell! Wisest man in the Western World. And I says to him 'Bertie, what's it all about?' And do you know, he couldn't tell me..." Kenneth Williams
JAWAID IQBAL ABBASI
Quote:OK - I thought I was dreaming recently when on a whim I picked up a pair of Skymaster 15X70s used for $45 including shipping and they turned out to be great!But from what I'm reading here apparently there are quality control issues and I'm simply lucky? The interesting thing is they have totally changed my view of how much binocular you can usefully handhold. I have always considered 10X50s the most I would even attempt to handhold. But now I would not be without this particular pair of 15X70s and I have yet to put them on my p-mount.I should add that I am NOT really doing binocular astronomy with them. What I am doing is using them for quick looks and for the first step when finding a new object by star-hopping. SOP for me now is to review my chart, then find the object - usually a double star these days, but sometimes a faint fuzzy - by tracking it down with the 15X70s. Only then do I switch to the finder and scope. The Skymaster's combination of wide field, extra light grasp and extra power = plus ease of use - is just perfect for this particular task as far as I'm concerned. And in this role my particular pair of Skymasters excel. They have become a constant companion - especially as I get akick out of using small, classic refractors from the 60s and 70s with generally dinky finders ;-)
Quote:I just got two pair of the Skymaster 15x70s. Not to direct anything bad towards anyone that owns them but they are a toy pair of binos. They have plastic barrels and plastics lens in the front. The old pair of Ultima 9x63s make them look like 5 dollar toys. They may of had good real glass at one time but the ones I just got are junk and both will be returned.
Quote:Quote:I just got two pair of the Skymaster 15x70s. Not to direct anything bad towards anyone that owns them but they are a toy pair of binos. They have plastic barrels and plastics lens in the front. The old pair of Ultima 9x63s make them look like 5 dollar toys. They may of had good real glass at one time but the ones I just got are junk and both will be returned.
Plastic objectives? Up until recently, as far as I could tell, these have always been glass. How did you determine their composition?
Quote:I spent some time on the phone with Kevin the other day talking about the Oberwerk LW 15x70. They are the same housing and setup. All mounting, prism clips, etc are the same. The big difference in the Oberwerk LW 15x70 is that they have a higher select grade of optical components, prisms, lenses, etc. They also have way better coatings and lastly they are indeed assembled and aligned better than any of the other 15 x 70 binos in this class. The Oberwerk LW 15x70 are the way to go in this range unless you just can't spend the money. I already had these and I do optical work and have for many years. So, I just wanted to see how good they could perform setup like they should of been to begin with and the known issues corrected. The prisms in the Skymaster seems to be the weak link. I placed one of the objectives in a 340mm refractor tube I have an used a Nagler eyepiece at 20x per inch and the image was rather good!
Binoculars: Miyauchi Saturn III - 33/39/50/71/150x100, WO22x70ED, Fujinon 16x70 FMT-SX Pentax 10x50 PCF-V, 10x43 DCF-SP, 6.5x21 Papilio
Nikon 10x35 EII, 7x35 E, 8x30 EII, 8x23CF AS Diplomat
B&L 7x26 Custom
Scopes: C9.25, TMB130SS/FT, SV80S-LOMO 80/480
- Did you also dull the shiny inside surfaces of the eyepiece spacer rings?
- How did you measure the eyepiece and objective focal lengths?
- You mention your suspicion that the prisms are likely the 'weak link.' Do you have a small optical flat to place against prism surfaces so as to assess the degree of flatness?
- Upon reassembling, how are you ensuring there is no prism 'lean' (which if present would introduce image rotation and eye strain)?
12" Dob, 4" Mak, 3" APO, PST, bunch of green eyepieces & an understanding wife.
Quote:It is the front prisms that stop them down. Good news, I now have the full 70mm use of the objective lenses! I moved the lenses back in each barrel just over 1/4 inch. The center of the lenses are now flush with the outside edge of the barrels. With this I now have fully illuminated exit pupils all the way around! I can also now focus as close as 32 feet and still have a 1/3 turn left on the focus knob. I have no idea other than their lock ring setup, as to why they had the lenses screwed so far into each barrel. Mine are back together now and they look like a 500 dollars pair of binos. Images are very sharp, contrasty and with way better color saturation!I will document all that I have done to them as soon as I can pull it all together. I am glad to answer any questions.
10" F/4.7 Modified Skywatcher Reflector, 38mm Orion Q70, 17mm Modified Ultima LX, 10mm TeleVue Delos, 7mm Pentax XL.