Today, I am writing to review my new eyes, as the title:
TS 20mm Wide-Angle and 70 ° apparent field.
eye on this there is little to say, in my opinion seplicemente excellent, especially when in relation to its nominal price. The 70 ° field are very comfortable, Perseus twice saying it was fully visible in the eyepiece, so much so that because of the convenience and good workmanship of the latter, I have avoided using other eye to focus more on observation.
Same for M42 which, although (with Baader UHC-s filter) very extensive, was completely centered in the eyepiece.
The difference with a single eyepiece 52 ° field is so apparent and it shows, in fact the same magnification, the vision in one eye wide field is much better! (In the picture below you can compare the difference between two eyes, with different visual field).
Putting aside the wide field of view for now, we talk about the optical quality of the eyepiece TS; is correct up to almost 90% of the field, and the resulting image is sharp and well contrasted . Compared with the resulting image from my Celestron 25mm eyepiece, the vision is clearer, but with more contrast and is generally better. It must be said that you can see similarities between this eyepiece, and identical but more expensive than other known brands. Ultimately, if you want an eyepiece with good optics and a field of apparent good, for a ridiculous price for an eye, do not hesitate and buy it, you will not regret!
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