Is a field flattener necessary?

Without a field flattener stars that are not in the center will appear distorted. Spacing is critical.

How do you use a field flattener?

Using a field flattener is a no-brainer: just screw it at the back of your telescope or insert it in the telescope using a nosepiece. That’s it.

What does a telescope field flattener do?

Field flattener lenses in binoculars improve edge sharpness and lower the distortion. Field flattener lenses counteract the Petzval field curvature of an optical system. In other words, the function of a field flattener lens is to counter the field-angle dependence of the focal length of a system.

Do I need a field flattener with a crop sensor?

Typically a telescope will require about a 3 inch focuser to handle a full frame sensor and usually (a few don’t) need a thing called a field flattener to enable the stars to be pinpoints in the corners of the image.

Is a coma corrector necessary?

If you personally find the edges of your field objectionable and the cost of a coma corrector seems reasonable, go for it, otherwise, if you’re fine with what you see, then don’t.

What does a coma corrector do?

A coma corrector is a shallow lens used to correct disortions in the optical field caused by the mirrors (or is that the primary only?) Coma usually becomes annoying towards the edge of field, so if you stay well inside it is minimized.

What is the Orion ed80t CF apochromatic refractor?

The Orion ED80T CF Apochromatic Refractor telescope is a very versatile telescope. It has the potential to pump out fantastic astro images while also performing well as an excellent visual telescope. It can be mounted to most modern mounts to truly be setup on a platform that you desire.

What is the f/6 ratio of the ed80t?

The ED80T is an 80 mm telescope with a 480 mm focal length and f/6 ratio. F/6 is on the low-medium speed end of the spectrum and so is good for wide fields at low magnification but can also provide good planetary photography with high magnification.

Is the ed80t a good telescope for astrophotography?

An APO is a good optical system for astrophotography, so let’s talk about specs. The ED80T is an 80 mm telescope with a 480 mm focal length and f/6 ratio. F/6 is on the low-medium speed end of the spectrum and so is good for wide fields at low magnification but can also provide good planetary photography with high magnification.

What is the ed80t good for?

The ED80T is an 80 mm telescope with a 480 mm focal length and f/6 ratio. F/6 is on the low-medium speed end of the spectrum and so is good for wide fields at low magnification but can also provide good planetary photography with high magnification. It works well for most astro imaging purposes. One thing you notice is the 80 mm aperture.