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Old Monday 26th February 2007, 23:25   #25
henry link
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Join Date: Feb 2004
Location: north carolina
Posts: 4,116
I have the 4mm TMB SuperMono. IMO it would be a terrible choice for birding. It's a unique monoblock design that sacrifices everthing (FOV, eye relief, off-axis sharpness) to render a very tiny field as bright and contrasty as possible. No problem if you are looking at something that only takes up a degree or two of apparent field like Jupiter through a telescope with a motor drive to keep it centered, but impossible for birding. Besides I don't think the SuperMonos or the AP SPL's are still available. A 5mm eyepiece will be pushing the envelope plenty with your scope. I think more magnification will show no extra detail at all . FWIW I can see just as much in daylight with the 5mm BO/TMB as I can with the slightly brighter 5mm TMB SuperMono.
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