What is the focal length of a 9×50 finderscope?

What is the focal length of a 9×50 finderscope?

210 mm
It employs a high-quality 210 mm focal length and broadband fully multi-coated objective lens, the same as our top-rated F050M2 finder scopes.

What is a 9×50 finderscope?

The Skywatcher achromatic 9×50 finderscope has a large 50mm objective, wide 45° field of view and a cross-hair reticule for easy navigation. The 50mm aperture is genuine, it is not stopped down like some cheaper finderscopes. 2.78x more light gathering ability than the smaller 6×30 model! Easy to setup and easy to use.

Can you use a finder scope as a guide scope?

Turn your 50mm finder scope into a Guiding Scope with this helical focuser. The focuser has 50mm threads(same as your guide scope) on one side and regular 1.25″ eyepiece holder on the other. It has brass compression type tension so it won’t mark your camera. It’s also has T threads.

What is an illuminated finder scope?

The RACI Illuminated 9×50 Finderscope from Celestron is specially designed telescope accessory for comfortable and intuitive use with Schmidt-Cassegrain optical tubes. The RACI corrects its transmitted image so the field of view always appears upright, which enables more intuitive telescope adjustments.

Do I need a finder scope?

Why do we need a finder scope? Finderscopes are generally very low in magnification- between 6x and 9x the naked eye- while some have no magnification at all. Without the finder scope, locating objects simply by looking in the main telescope would be very difficult.

Do I need a guide scope for astrophotography?

No, there is no need. Guide cameras usually guide on stars at or near the center of the field of view where the image is good enough with just about any guidescope.

What is a good guide scope?

As an example, if you have a telescope that is 1500mm in focal length, you should select a guide scope with a focal length of at least 1500/5 = 300mm. So, assuming that your main telescope has a focal of 750mm, a good guide scope would have a focal length of about 150mm and an aperture of 50mm.

What is the purpose of the finder scope?

A finderscope is a simple but invaluable accessory that attaches to your telescope. The smaller optical tube provides a wide field of view to help you locate celestial objects before observing them through your main telescope, but it must be aligned accurately to your telescope before use.