Vanguard Endeavor ED 8x42 & 10x42 binos / Vanguard Endeavor HD 82mm (20-60x) angled spotting scope / Vanguard Abeo 283AT tripod with PH-114V head
Quote:A 10x50, for example, may actually be less than that.Two questions for those more informed than I am:2. Are there companies that are accurate (as is possible) when presenting the lens size for a binocular?Much thanks for your comments.Frank
"The heavens declare the glory of God"...
Quote:The physical clear aperture of most binoculars are as stated, with a few being perhaps 1mm smaller due to the construction of the lens cell.The far greater problem, ad Ed pointed out, is effective aperture restriction. While we commonly think this results from too-small front prism openings, it's really because of the manufacturer's insistence (spurred by customer demand for compactness) on using objectives of excessively short focal length. If instead of the f/3.75-4 lenses so commonly used, f/4.5 or so would redress this unnecessary affliction.
Quote:I suppose companies could put 10x50(more or less), 15x70(almost), etc. on their binos. A little sarcasm, but it's true. Some companies probably do their best. Others may not really care about accuracy. I prefer a binocular that is what it's supposed to be.
First and foremost observing love: naked eye.
Last but not least, telescopes.
And I sometimes dabble with cameras.
Quote:Yes, there was a time when people took pride in the quality of the product they made. It seems that many companies today aren't like that.Best wishes,Frank
Quote:There have always been poorly made, under performing, "junk" binoculars.
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
Milton Wilcox R.I.P