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
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:I don't see the EO Triumph listed as a 7x35; only an 8x42. The Triumph shows a minimum IPD setting of 55mm which may be too wide for a five year old. Bushnell doesn't even list the IPDs of their 7x35s but they do say the prisms are BK7 instead of the preferred BaK4. Do you want to take a chance that they will fit? I doubt they go down to a minimum of 50mm. Only the Yosemite binos have the 50mm minimum IPD that I think would guarantee a fit for a youngster. They use the premium BaK4 prisms as well. The price is higher but the chances of getting satisfaction from them is higher as well.Rich
My binocular collection Binoculars by date of addition Binoculars in Alphabetical order
Quote:The exit pupil on the 8x is too small if it is to be used for the night sky, I think.
First and foremost observing love: naked eye.
Last but not least, telescopes.
And I sometimes dabble with cameras.
Quote:The point is, Tony, not that 8x30 shows you more than 6x30 - which is true - but that an 8x30 has a rather small exit pupil compared to e.g. 8x40 or 8x50 binoculars.
One of the key attributes of binocular viewing is the way two-eyed viewing reacts to bright colourful images. A 3.75mm exit pupil is borderline for that, if not already too small.
Quote:If I look at the Pleiades, the double cluster, or just the Milky Way, which one of these two binoculars would give me more pleasing views? And let's define pleasing: bright, sharp, spectacular, groupings of stars.
Quote:My direct personal experience is that star colours are more vivid with larger exit pupils.
Quote:Another question: in which one of these two will I be able to see fainter stars?
Quote:Let's put it this way. If I look at the Pleiades, the double cluster, or just the Milky Way, which one of these two binoculars would give me more pleasing views?If I try Andromeda galaxy: in which one of these two will it be easier to notice something?Or is the answer entirely subjective?
Quote:I also feel kind of guilty trying to use 30-35mm bins for astronomy.
Quote:I think I will still buy the 6x Yosemite. The exit pupil on the 8x is too small if it is to be used for the night sky, I think. I will take a decision as soon as possible...Thanks for your help, it was invaluable.Virgil.
Show me an aging Greek and I'll show you the Nick of time.
Quote:Star colors are generally more saturated in larger apertures. So 10x50s show more colorful stars than 10x30s. That's a function of aperture, not exit pupil.