Re: USO and S&B Low Light Capability
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: TiroFijo</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: sobrbiker883</div><div class="ubbcode-body">I've loved my USO SN3's (with the ERGO as 300WSM refers to, and my 5-25 TPal has been good too-35mm tube) every time I've shot it at night.
They also offer a 58mm objective for the same price as the 44 on the 3.2-17's. <span style="font-weight: bold">A larger objective does not get more light through the tube (a larger tube does-and you can get up to 35mm), but it may enhance your resolution, making everything appear better. </span></div></div>
Wrong... ask any optic maker.
A larger objective transmits more light, everything else being the same (quality and number of lenses, same basic design, coatings, etc.).
A larger main tube does nothing for light transmission. </div></div>
The above is true. Besides more light, a larger objective will have better low light capability, better resolution and more important, larger exit pupil.
It cracks me up when people compare a 44mm USO to 56mm S&B/PR and expect them to have the same low light capability, its just not going to happen. Compare them to a 58mm USO, then its a fair comparison.