----- Original Message ----- From: "J. C. O'Connell" Subject: RE: 50 or 100 mm
> Why? 50mm and 100mm do vastly different things. > > If you need the AOV of a 50mm, > the 100mm is absolutely useless. > > If you need the working distance > of the 100mm, the 50mm is absolutely useless. > > Neither one is better than the other for everything > anymore than a regular non-macro 100mm lens is better > for everything than a regular non-macro 50mm lens. Through the magic of thread drift, we have lost track of one of the original poster's parameters, which was maximum magnification on a bellows. For this, the 50 will be the better choice, since it will give more magnification than the 100 at any given extension. William Robb
