2 replies to this topic

[rmorein]

The conventional viewing posture leaves much to be desired, compared to a typical scope with star diagonal. Diagonals cannot be fitted to typical NV housings. Hence, the desire for an objective-side diagonal. The cheapest option is a large mirror on a card table.

 

Consumer second surface mirrors are made of float glass, not ground to flatness. Yet high quality float glass seems pretty flat to the eye. NV usually has low magnification. Has anyone tried this?

 

Are there sources of float glass mirrors spec'ced for flatness?

[TOMDEY]

You got me chuckling --- I and others used to sell flat enough mirrors a few decades ago. When I shut down the business I took all my inventory to the Town Dump. I of course kept a few premium superb optical flats for myself. Good thing I kept my ~real job~ working as a research scientist. I think you can still find decent optical flats (not superb --- just decent) here and there on the used components market... things like stripped out copier/scanner mirrors and such things. First surface aluminized would be the choice.     Tom

 

Here's my old catalog page --- long defunct.

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[MisterDan]

Now, THAT's a great finder solution for bigger scopes.

 

Red dots and unit-power reticle projections... Yaaaaaawn.

 

Dang it. Now I need a bigger scope, just so's I can adapt a "Dey-Tripper" Penta-mirror Bino-Finder.

 

Thanks for sharing, Tom.

Best wishes.

Dan