Pentax 70513 SMC-XW 7 1.25-Inch Eyepiece For Telescopes Pentax Spotting Scopes

Description

Pentax 70513 SMC-XW 7 1.25-Inch Eyepiece For Telescopes Pentax Spotting Scopes
Brand New in its Original Retail Box
Thecamerabox
Authorized Dealer - Mfr # 70513 / UPC 027075075214
Here is what you get:
Pentax SMC XW 7mm Wide Angle Eyepiece (1.25") - 55x w/ 65mm, 71x with 80, 90x with 100mm Pentax Scopes
Push-On Front & Rear Caps
Plastic Helicoid Case
Limited Lifetime Warranty
Product highlights:
70° Apparent Field of View
20mm Eye Relief
Waterproof & Fogproof
Fits Pentax Spotting Scopes
Pentax premium spotting scopes adhere to the American standard of 1.25" eyepiece thread diameter, facilitating the use of eyepieces from independent manufacturers. That also means, of course, that the wonderful Pentax eyepieces can be used in other telescopes and spotting scopes which accept 1.25" eyepieces.
Pentax eyepieces are a near consensus choice amongst serious amateur and professional astronomers as the best that's out there, quite an accomplishment indeed given the fervent passion of the collective.
The XW line represents an even further improvement upon the venerable XL series. The apparent field of view has been expanded to a whopping 70°, but remarkably this was achieved
without
reducing their impressive eye relief of 20mm. There are eyepieces available with wider apparent viewing fields, but to take advantage of that wider field you'll have to be much closer to the eyepiece. This isn't exactly conducive to extended observing sessions. Additionally, there are lesser eyepieces with similar claims of 70° apparent viewing fields, but the performance upon the edge of these eyepieces isn't on par with the Pentaxes. If you're using a telescope with a fast aperture, this is of particular importance.
Pentax 70513
Magnification
71x with the PF-80ED
74x with the PF-80ED-A
90x with the PF-100ED
Angle of View
1.0° with the PF-80ED & PF-80ED-A
0.8° with the PF-100ED
Field-of-View (@ 1000 Yds)
52' (
17 m at 1000 m
) with the PF-80ED & PF-80ED-A
41' (
14 m at 1000 m
) with the PF-100ED
Exit Pupil Diameter
1.1mm
Eye Relief
20mm
Relative Brightness
1.2
Twilight Factor
75.4 with the PF-80ED & PF-80ED-A
94.9 with the PF-100ED
Weatherproofing
Waterproof & fogproof
Dimensions
2.4 x 4.7" (
61 x 119mm
) WxH
Weight
0.86 lb (
390 g
)
Packaging Info
Package Weight
1.2 lb
Box Dimensions (LxWxH)
7.5 x 4 x 3.4"
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