Very frequently only very faint stars will be in close proximity to the object you wish to see.
In such cases even at the dimmest setting of the finder piece, there might still be a small amount of glare that hides the star from your sight, especially when a little dew has formed on the finder's window.
This is a standard (Red-dot finder) from Skywatcher.
On average this will gain you one order of magnitude!
The circuit is based upon (1.5v led flasher) for several reasons:
- The original battery is 1.5v
- The design has to fit a very narrow space, and all parts must be few and small.
- Very low cost: it has to worth shutting down the finder manually
You can find the files here:
Some step by step images are given above, including a sample movie with the finished product.