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Modifying a low cost Barlow lens for use with the Pentax PF-EDAII spotting scope
USA source for M4 nylon thumbscrews You're probably getting tired of my Barlow monologue - sorry for this added post, but just discovered this. For those in the USA, where metric nylon thumbscrews are hard to find, AgenaAstroproducts not only sells the GSO 2x Barlow ($33) featured in this... -
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Modifying a low cost Barlow lens for use with the Pentax PF-EDAII spotting scope
Replace your GSO Barlow metal thumbscrew with a Nylon one Folks accustomed to the nice collet type eyepiece-securing mechanism of the Pentax PF series scopes may not like the marks that the metal thumbscrew of the GSO Barlow discussed in this thread can leave on their eyepieces. I always change... -
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Modifying a low cost Barlow lens for use with the Pentax PF-EDAII spotting scope
Adapting a 2x Barlow for your Pentax PF scope without machining For those able to do milling, modifying the GSO 2x Barlow to enable focus at infinity in all the Pentax PF scopes (65, 80, and 100 mm) is simple, as described earlier in this thread. However, most birders do not have access to... -
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Modifying a low cost Barlow lens for use with the Pentax PF-EDAII spotting scope
IGNORE earlier post – NEW Pentax Barlow MOD here I suspect it is typical of problem solving that after working along one line for several years with some success (in this case, adjusting the length of the three segments of the GSO Barlow), suddenly a much BETTER solution presents itself with a... -
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Modifying a low cost Barlow lens for use with the Pentax PF-EDAII spotting scope
In another thread in this section, Bjorn, who uses a Pentax XW 14 mm eyepiece in his Pentax PF-65EDAII spotter, posted a question about whether or not folks would recommend obtaining a Pentax 10 mm XW eyepiece for occasional higher power views. In my opinion, IF cost, weight, and bulk are NOT...