I have a Synta 120mm f/8.3 ota for sale. I have been using it for solar grab and go, but is a bit large for my spare mount. It works best at 100mm f/10. There seems to be astigmatic flare when using full aperture. Stopping it down to 102mm cleans the diffraction pattern up nicely. I picked up the ota with only the tube rings. No finder or diagonal. It owes me only $150.00. Can supply diagonal and finder if needed. Price negotiable. So if you are looking for a 100mm acro that has the light gathering power of a 120mm for wide field low power, this could be the budget scope your looking for.