"The heavens declare the glory of God"...
Quote:Since I have two of these 1000mm/F10 reflex lenses, maybe there's some solution to join them together, to form a giant "binoculars?" I tried by using old porro prism binocular with front lens removed, only eyepieces and prisms in place, but distance between tubes was still large to fit on both lenses.
MarkLeica 8x20; Nikon Action 7x35; Vixen Apex Pro 8x42; Orion 15x63; Docter Nobilem 15x60WO Megrez II 80 FD / APM 107mm f/6.5 / Mewlon 210 on DM-6 + Berlebach Planet
Quote:As I already noted, I DON'T LIKE 30X80. I need at least 40X or 50X zoom. I have used giant fujinon 25x150 binoculars, they are nice, but zoom is not enough! Regarding the "conversion" I have acces to precise lathe and milling machine, also own light duty 3 axis CNC milling machine which can work with aluminum, brass and other soft metals, so, doing custom parts is not that hard for me.
JAWAID IQBAL ABBASI
Milton Wilcox R.I.P
AL MasterObserverC #24
Quote:However, on what may be considered a cautionary note,so far as "good for 100x during the day" goes, what I've found is that magnifications of around 100x can be tremendously exciting and awe-inspiring, but almost always ONLY when viewing objects that are located less than 100 yards away in the first place.Beyond that,atmospheric effects all too often come into the equation.
Quote:Is this website real?http://www.fitsmybudget.com/OpSwiss-15-45x80-Zoom-High-Resolution-Binoculars-...Price of these opswiss binoculars is exactly half of the price on amazon!
Binoculars: Miyauchi Saturn III - 33/39/50/71/150x100, WO 22x70ED, 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
Quote:Ok. Understood. If zooms are trash, I won't use them.Since I have two of these 1000mm/F10 reflex lenses, maybe there's some solution to join them together, to form a giant "binoculars?" I tried by using old porro prism binocular with front lens removed, only eyepieces and prisms in place, but distance between tubes was still large to fit on both lenses.
Quote:To create an erect image without prisms would require an eyepiece with a positive/negative Galilean design, I suppose.
First and foremost observing love: naked eye.
Last but not least, telescopes.
And I sometimes dabble with cameras.
Quote:Another question regarding these lens. As I know, the zoom ratio is determined by "length" of objective / "length" of eyepiece. So, say I have 1000mm objective (F10 power) and 10mm eyepiece (F1.8). Zoom will be 100x as I know, but what will be the effective F number?
I think a more complete answer is required.
Quote:Since I have two of these 1000mm/F10 reflex lenses, maybe there's some solution to join them together, to form a giant "binoculars?"
Best regards, Patrik Iver 60°N, 22°E
Quote:So, regarding the image, in which case from above mentioned, it will be brighter? if this was a photography question, I definetly know that F2.8 lens provides much much brighter image than F10 lens. But, in astronomy, where pupil matters, F number has no use?
Quote:This is what we're trying to determine, Rich.
Quote:How does one propose getting a proper interpupillary distance with two 100+mm diameter optics if these Maks are used? Do they have enough back focus for prism assys to be incorporated? Did I miss something here?
Quote:Say the 3 fold calendar, like this:https://sites.google.com/site/giffitti/3FOLDSHIPPINGCALENDAR.jpgis hang about 180 meters away and binoculars allow to distinguish and read smallest text ("week") on them. Such binoculars are considered good or bad?