stressors
发表于 2025-3-23 10:33:00
https://doi.org/10.1007/978-3-211-99421-4Some sort of tube structure is required to keep the telescope optical components appropriately lined up and pointing at anything. The tube structure can be either opaque or open.
教唆
发表于 2025-3-23 16:34:12
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Opponent
发表于 2025-3-23 19:01:36
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deforestation
发表于 2025-3-23 23:53:03
Forschungen aus Staat und RechtA characteristic of amateur telescope makers and other such groups is pride in utilizing mundane materials and items in their exotic creations. To make it sound properly esoteric, let’s call it “Creative Cross Utilization.” That justifies, hopefully, maintaining an inventory of mundane materials and items – in other words, junk collecting.
点燃
发表于 2025-3-24 04:04:53
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积习已深
发表于 2025-3-24 09:28:12
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harmony
发表于 2025-3-24 12:19:49
Telescope Types and Designs,In this chapter we examine the various telescope types from the point of view of an amateur telescope maker looking at the appropriate uses for each design type..There is no “best design,” but depending on the intended use, there are advantages associated with each.
NICE
发表于 2025-3-24 16:40:22
,The 80 mm Refractor,A 3+ inch refractor can serve as a travel ‘scope, a first ‘scope project, or a practical ‘scope to use at star parties. It is large enough to provide nice views but small and light enough to be easily transported and quickly set up. It can be built either as a simple, straight through ‘scope or with a star diagonal or both.
使饥饿
发表于 2025-3-24 19:04:14
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慢跑
发表于 2025-3-25 00:38:47
Focusers, Eyepieces, Barlows, and Finders,This chapter includes a discussion of focusers that can be built or purchased, eyepiece types available on the Internet or which can be salvaged from other equipment, focal-length extender devices, and finder telescopes.