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Televue 20mm Plossl
| Submitted: Wednesday, 14th September 2005 by John (asimov) |
This article has been read 3391 times | Comments |
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TV 20mm Plossl
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The Televue 20mm Plossl eyepiece was tested in 2 scopes - my 12" f/5 newtonian giving 80x and my 6" acromatic refractor giving 60x..
The review will show a side-by-side comparison of how the eyepiece fared on a list of qualities in each scope.
| Quality | Thoughts |
| On-axis sharpness |
This was good to excellent on all subjects. |
| Off-axis sharpness |
Excellent in both scopes...no coma visible to my eye. |
| Contrast |
Very good to excellent. |
| Field Flatness |
Focusing on an object On-Axis & letting it drift to the edge of the field, I found a SLIGHT amount of de-focusing was apparent. Better than some of my other EPs. I found this to be not overly bad. A fraction worse at F5 than at F8. |
| Light Transmission |
Was pretty good I would say. |
| Chromatic Abberations |
I noticed nil amount of this in both scopes. |
| Eye-Relief and Comfort |
Comfort wise, it was quite pleasant, the eyecap is great to use. eye relief is ok for me, a bit like most of my EPs. |
| Ghosting |
Absolutely nil in both scopes. |
| Scatter |
Better than most of my up-market EPs on Jupiter |
| Field Stop Condition |
Nothing abnormal to report. |
| Build Quality |
What can I say? Top quality! The coatings are just wonderful to gaze at! A lovely deep green. Nicely blackened inner barrel & field stop etc. The only thing I didn't much care for is the field lens cap is too tight & takes a bit of effort to get off. The eye lens cap is too loose & will fall off if you turn the eyepiece up side down. A nice looking eyepiece, & nice to use.
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ConclusionI intend to buy more of these!
Review by John (asimov). Discuss this review on the IceInSpace Forums.
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