Table of Contents
Is a 25mm eyepiece good?
25mm – 30.9mm Telescope Eyepieces: These are extended field eyepieces for longer focal length – good for large nebula and open clusters. This magnification range is superb for showing large, starry vistas as well as extended nebula with star fields, etc.
Is a bigger eyepiece better?
The wider fields are an advantage but since they’re generally longer focal lengths, they also provide brighter views. If one is organized swapping between 1.25 inch and 2 inch eyepieces only takes a few seconds extra and the views can make it worth the effort.
What focal length eyepiece do you need?
For the highest-power eyepiece, we want something that gives an exit pupil of about 0.7mm. For this focal ratio, that works out to an eyepiece focal length of about 5mm which will give a magnification of 143x. That’s about 36x for each inch of objective diameter, which works on nights of average seeing or better.
What is the magnification of a 25mm eyepiece?
50-degrees
For example, a 25mm Plossl eyepiece generally has an AFOV of 50-degrees. Used in a telescope with a 1000mm prime focal length, the magnification is 40x. The true field of view is therefore 1.25-degrees (50/40=1.25).
Are 2 inch eyepieces worth it?
The reason to design an eyepiece with a 2 inch barrel is because the design requires a field stop that is larger that a 1.25 inch barrel will allow. Larger field stops provide wider fields of view. By the way, the field stop is the ring you see as the edge of the field of view.
Why do people have two eyepieces?
2″ eyepieces often provide a wider field of view and brighter images. These eyepieces are perfect for viewing large patches of the sky where large and/or dim objects can be observed.
Which telescope eyepiece is best?
Best Telescope Eyepiece Reviews
- Celestron – 1.25-Inch Eyepiece and Filter Accessory Kit.
- SVBONY Telescope Eyepiece Set.
- Orion 08890 1.25-Inch Premium Telescope Accessory Kit.
- Celestron 93428 X-Cel LX.
- Gosky Astronomical Telescope Accessory Kit.
- Meade Instruments 07199-2 Series Eyepiece.
- Celestron 93230 Eyepiece.