|
Yup same as the one I had. Frankly it should be replaced, not fiddled with.
Easy to do: remove metalwork and paint it all matte black, then reassemble.
1. The 3 clamps that stop the mirror falling out probably don't stop it moving sideways. Secondly they are so grossly made that they have three fingers protruding over the front surface and I have seen mirrors chipped by these. In addition they cause nasty diffraction spikes on bright objects.
So think about getting rid of them.
2. Mirror sits on top of the adjustments bolts. Also may fracture the mirror.
3. Mirror cell can shift laterally (side to side) relative to the OTA because the bolts are just cheap rubbish ones in sloppy holes in wood, with the result being misalignment.
I'm guessing your cell is spring-loaded with wing nuts on the back as mine was, that's also hopelessly prone to shifting.
Really should be using decent metric cap screws in a push-pull arrangement.
4. The base plate and the board under the mirror are ply, which changes dimension as often as the weather does. Another source of trouble. Really should be metal or a composite of some sort.
Mirror cells are a good candidate for using aluminium composite panels or glass/carbon composites, all of which are far lighter than ply and 10x stiffer for the same thickness. Draw up what you want and you could get a price from several suppliers in Sydney.
I'd also investigate using silicone pads under the mirror to attach to the plate without the ugly clips.
|