On Mon, Mar 24, 2003 at 04:44:09AM +0100, Willem-Jan Markerink wrote: > On 22 Mar 2003 at 10:56, Keith Green wrote:
> > Why between lens and body? > > > > See http://www.speedgraphic.co.uk/pdfiles/p11-13.pdf > > > > for the Ohnar super wide-angle / fisheye converter. > > But that's on *top* of the lens too, not between lens and body. Yes. While front-of-lens converters are obviously the only choice for cameras with fixed (non-interchangeable) lenses, their downside with SLRs is that they tend to be lens-specific, and making one that would work with a lens that's wide-angle to begin with (like, 20mm or wider) is apparently hard - and they'd have be huge to work with 77mm lens diameter that's typical to wide-angle zooms. > Other than that, one must almost assume that the optical concept > (with non-fused optics) is downright impossible, otherwise some > aftermarket company *must* have jumped at this opportunity.... Perhaps it is simply too difficult to do well and still stay within reasonable price range, given the preceived size of market (with expectation that full-size sensors will dominate in a few years). > Never seen any elaborate/expert discussion about this either, so it > probably is a bit more braincracking (even to falsify the > possibility) than we think....:)) You are probably right. Yet, let's hope someone has been cracking their brains about it and comes up with a solution sometime soon. -- Tapani Tarvainen * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
