Bennet0602 Posted December 20, 2021 Share Posted December 20, 2021 I've seen a lot of 500mm telephoto lenses on ebay for as low as 35 euros and im wondering if the can be used for some beginner astrophotography? The only obvious issue with these is the aperature of 8.0 but could they be used for brighter deep-sky objects if you use a tracker and longer exposures? Quote Link to comment Share on other sites More sharing options...
Cumbrianwolf Posted December 20, 2021 Share Posted December 20, 2021 37 minutes ago, Bennet0602 said: I've seen a lot of 500mm telephoto lenses on ebay for as low as 35 euros and im wondering if the can be used for some beginner astrophotography? The only obvious issue with these is the aperature of 8.0 but could they be used for brighter deep-sky objects if you use a tracker and longer exposures? Have you got a link or more details as to lots of 500 mm photo lenses, also what camera are you using it on? Another option is the mirror lenses, a bit of a task to manually focus but with a Bahtinov mask it can be done, and they used to work well for me back in the days of film. Quote Link to comment Share on other sites More sharing options...
Bennet0602 Posted December 20, 2021 Author Share Posted December 20, 2021 https://www.ebay-kleinanzeigen.de/s-anzeige/doerr-danubia-500mm-1-8-500-mm-canon-ef-kompatibel-neuwertig/1962752750-245-9663?utm_source=sharesheet&utm_medium=social&utm_campaign=socialbuttons&utm_content=app_android Someting like this, there are a lot of these but from diffrent brands. 1 Quote Link to comment Share on other sites More sharing options...
TerryMcK Posted December 20, 2021 Share Posted December 20, 2021 You are probably wasting money on something like that. Best with a shorter focal length for DSOs and definitely not a zoom lens. 1 Quote Link to comment Share on other sites More sharing options...
Cumbrianwolf Posted December 20, 2021 Share Posted December 20, 2021 (edited) 1 hour ago, Bennet0602 said: https://www.ebay-kleinanzeigen.de/s-anzeige/doerr-danubia-500 mm-1-8-500-mm-canon-ef-kompatibel-neuwertig/1962752750-245-9663?utm_source=sharesheet&utm_medium=social&utm_campaign=socialbuttons&utm_content=app_android Something like this, there are a lot of these but from different brands. I agree with what Terry said, I have also had such lenses in the day, and they are rather bad to be honest, often narrow fields of view like looking through the cardboard tube from a kitchen towel roll and very hard to manually focus. Edited December 20, 2021 by Cumbrianwolf Better grammar. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.