Pentax SMC XW 20mm Wide Angle Eyepiece (1.25") - 19x w/ 65mm, 25x with 80, 31x with 100mm Pentax Scopes
- Price: $267.16
- Free Shipping (USA)
- In Stock
- B&H # PEEP20X
- Mfr# 70516
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.
These are large and expensive eyepieces, but that's the price to pay for such an enviable combination of viewing field and eye relief. Buy the best once, and you'll still be enjoying the quality long after you've forgotten the price. Should you ever need to painfully part with your purchase, the best always has the most liquidity on the used market because they're rarely ever offered.
- Continuous helicoid eyecup design gives perfect eye relief for all
- Accepts conventional 1.25" diameter filters for astronomical and terrestrial applications
- Perfect for digiscoping when combined with PF-DS1 adapter(and appropriate Pentax Optio digital camera)
| Magnification |
25x with the PF-80ED 26x with the PF-80ED-A 31x with the PF-100ED |
| Angle of View |
2.8° with the PF-80ED & PF-80ED-A 2.3° with the PF-100ED |
| Field-of-View (@ 1000 Yds) |
147' (49 m at 1000 m) with the PF-80ED & PF-80ED-A 118' (39 m at 1000 m) with the PF-100ED |
| Exit Pupil Diameter | 3.2mm |
| Eye Relief | 20mm |
| Relative Brightness | 10.2 |
| Twilight Factor |
44.7 with the PF-80ED & PF-80ED-A 55.7 with the PF-100ED |
| Weatherproofing | Waterproof & fogproof |
| Dimensions | 2.4 x 3.4" (61 x 86mm) WxH |
| Weight | 0.78 lb (355 g) |
REVIEW SNAPSHOT®
by PowerReviews(based on 2 reviews)
Ratings Distribution
REVIEWS
Reviewed by 2 customers
Sort by
Displaying reviews 1-2
Pros
- Easy To Use
- Good Padding
- Great Optics
- Strong Construction
- Widely Compatible Adapter
Cons
Best Uses
- Terrestrial Viewing
Comments about SMC XW 20mm Wide Angle Eyepiece (1.25") - 19x w/ 65mm, 25x with 80, 31x with 100mm Pentax Scopes:
A decent all round match with the 80mm pentax spotting scope but if higher magnification is needed to see small things like leg band colors on birds a higher magnification would be recommended.
- Was this a gift?:
- No
Pros
Cons
Best Uses
Comments about SMC XW 20mm Wide Angle Eyepiece (1.25") - 19x w/ 65mm, 25x with 80, 31x with 100mm Pentax Scopes:
This is "la creme de la creme" of all Pentax xw eyepieces. My review is based on terrestial observation with a Pentax PF 80 ED scope. I have all four eyepieces 20-14-10-7. I bought this one last (Stupid!) and I can assure you it definitely surpasses the other ones by a long shot, the 14 comes second followed by the 10 and the 7 with less honors pushing the scope to the limit in magnification for practical uses. Buy the 20 first followed by the 14. The 10 is pretty good, the 7 the lacks the brightness of the others and is unusable when the slightest weather turbulance is present but nice to have for those picture perfect clear days.
- Was this a gift?:
- No
Displaying reviews 1-2
REVIEW SNAPSHOT®
by PowerReviews(based on 2 reviews)
Ratings Distribution
REVIEWS
Reviewed by 2 customers
Sort by
Displaying reviews 1-2
Pros
- Easy To Use
- Good Padding
- Great Optics
- Strong Construction
- Widely Compatible Adapter
Cons
Best Uses
- Terrestrial Viewing
Comments about SMC XW 20mm Wide Angle Eyepiece (1.25") - 19x w/ 65mm, 25x with 80, 31x with 100mm Pentax Scopes:
A decent all round match with the 80mm pentax spotting scope but if higher magnification is needed to see small things like leg band colors on birds a higher magnification would be recommended.
- Was this a gift?:
- No
Pros
Cons
Best Uses
Comments about SMC XW 20mm Wide Angle Eyepiece (1.25") - 19x w/ 65mm, 25x with 80, 31x with 100mm Pentax Scopes:
This is "la creme de la creme" of all Pentax xw eyepieces. My review is based on terrestial observation with a Pentax PF 80 ED scope. I have all four eyepieces 20-14-10-7. I bought this one last (Stupid!) and I can assure you it definitely surpasses the other ones by a long shot, the 14 comes second followed by the 10 and the 7 with less honors pushing the scope to the limit in magnification for practical uses. Buy the 20 first followed by the 14. The 10 is pretty good, the 7 the lacks the brightness of the others and is unusable when the slightest weather turbulance is present but nice to have for those picture perfect clear days.
- Was this a gift?:
- No
Displaying reviews 1-2
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