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Lenses
General Lenses
500mm for £100?
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<blockquote data-quote="aroy" data-source="post: 449777" data-attributes="member: 16090"><p>Mirror lenses have a fixed f-stop, and rings in OOF areas. So you are left with speed and ISO as variables. Unless you are shooting fast action - BIF, Sports etc, a mirror lens will do the job, though not as well as an equivalent telephoto lens. As far as I remember for a given size, the telephoto lenses are sharper than mirror lenses of upto twice the diameter, but they are extremely inexpensive option for long distance surveillance or shooting the starts.</p></blockquote><p></p>
[QUOTE="aroy, post: 449777, member: 16090"] Mirror lenses have a fixed f-stop, and rings in OOF areas. So you are left with speed and ISO as variables. Unless you are shooting fast action - BIF, Sports etc, a mirror lens will do the job, though not as well as an equivalent telephoto lens. As far as I remember for a given size, the telephoto lenses are sharper than mirror lenses of upto twice the diameter, but they are extremely inexpensive option for long distance surveillance or shooting the starts. [/QUOTE]
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500mm for £100?
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