On 2012-09-27, Chris.B wrote:

I use a Baader "Fringe Killer" which (usually) produces white images when used with Baader solar foil.

Would a 2" Barlow, or an old fashioned (film camera) tele-extender, tolerate the heat before the wedge?

You might cook a barlow with cemented lens elements, so I wouldn't
recommend it. The same thing applies to a photo teleconverter. The photo
teleconverter is designed to be attached directly to the camera and
therefore might not work optically with the wide spacing in front of
the camera you'd get with the Herschel wedge. A telescope with more
focuser travel would work with an SLR. A compact digital camera with
manual shutter speed and aperture settings would work afocally with what
I have now, but I really don't need to buy another camera.

I also have a Baader Semi-APO filter that's nice for lunar viewing.
Performance is similar to the Fringe Killer filter. I need the additional
filter factor of the Solar Contunuum filter when viewing the Sun, which
is another reason I use Solar Continuum filter with the Herschel wedge.

Bud