| Tamiji Homma |
| (Pooh-Bah) |
| 07/03/09 02:49 PM |
Re: Why aren't eyepieces lighter?
|
Quote:
Imbalance is only one of several "ills" of excessively porky eyepieces.
A case full of eight-element eyepieces is heavy and adds to the hassle of loading and unloading as a result. A tall, heavy eyepiece is more apt to unscrew an SCT diagonal during a slew. A heavy eyepiece is more apt to damage itself on impact than a lighter one (hits with more force). Those are just a few examples.
The number of ills associated with lower weight eyepieces is smaller (like everything else about them).
Regards,
Jim
Here is datapoint, weight measurement of eyepiece without caps.
Those three eyepieces are very light for its focal length.
81.0 25.0 Zeiss-Asphical 1.25"
75.0 28.0 Siebert-UW 1.25"
68.0 23.0 SV23
Code:
gram focal name
958.0 28.0 WO-UWAN
771.0 30.0 BW-Optik/Zeiss
722.0 17.0 TV-Ethos
678.0 22.0 TV-Nagler
555.0 50.0 Tak-LE
530.0 42.0 Vixen-LVW
492.0 40.0 TMB-Paragon
424.0 3.5 Pentax-XW
390.0 10.0 Pentax-XW
358.0 20.0 Pentax-XW
354.0 31.0 Hyperion 2" mode
308.0 32.0 Edmunds-RKE
298.0 24.0 Hyperion 2" mode
291.0 30.0 TMB-Paragon
248.0 14.0 Denkmeier
237.0 16.0 WO-UWAN
179.0 19.0 TV-Panoptic
175.0 32.0 TV-Plossl
160.0 30.0 Tak-LE
150.0 3-6 TV-Nagler-Zoom 3-6
133.0 5.0 Tak-LE
131.0 3.6 Tak-LE
101.0 12.5 Tak-LE
89.0 5.1 Pentax-XO
84.0 16.0 ZAO2
81.0 25.0 Zeiss-Asphical 1.25"
75.0 28.0 Siebert-UW 1.25"
73.0 15.0 TV-Plossl
68.0 23.0 SV23
67.0 10.0 ZAO2
66.0 6.0 ZAO2
64.0 11.0 TV-Plossl
62.0 4.0 ZAO2
56.0 7.0 TMB-mono
Tammy