1
$\begingroup$

I have a 700 mm focal and 76 mm aperture telescope. I bought it a few days ago. I tried to spot Mars for 3 days but I only see red light. I use an 20 mm eyepiece for finding it and 4 mm eyepiece for seeing but only red light is visible. Please help me.

$\endgroup$
  • 1
    $\begingroup$ Is the red light just a dot or a ring of red light? EDIT : If you could also link to your telescope model, it would be great. $\endgroup$ – RyugaGod Nov 12 '20 at 11:09
  • 4
    $\begingroup$ If you go to astronomy.tools' FoV calculator, select Mars from the "Solar system" dropdown, then enter in your telescope and eyepiece details, and click "Add to view"; does the resulting image look like what you can see? $\endgroup$ – Aaron F Nov 12 '20 at 22:10
  • $\begingroup$ As RyugaGod asked, is it a dot/disk or a ring? 'Cause my first thought is you're out of focus, and a ring would be very indicative of that. Also, I assume you DON'T have a filter on there that's red? (I've left filters on my camera that I forgot about.) $\endgroup$ – Stuart Robbins Jan 13 at 6:20
0
$\begingroup$

Mmm... it's a pretty small scope using a fairly high power. The disc of Mars is not going to be very large (just a few seconds of arc across) so I don't think you should expect to see something that looks like a HST image! Mars is pretty red as a rule, so 'red light' is what you should be seeing because the disc is too small to show much detail.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.