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Forum: Pentax SLR Lens Discussion
07-18-2014, 08:13 PM
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Considering how well built the F series lenses are, that would have been painful.
I have no personal experience with any of the Pentax 300mm f/4 primes. I do however have considerable experience with the SMCP-FA*300mm f/2.8 ED [IF]- the f/2.8 prime does have a distinct advantage over the sigma 100-300mm f/4 APO EX DG at wider apertures, but at f/8 they both perform very well. Falk lumo suggested that it would be unfair to compare the Pentax DA 60-250mm f/4 against the Sigma 100-300mm f/4 APO EX DG as the pentax lens is a DA, the sigma can be used on full frame and optically the two lenses are very different.
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Forum: Pentax SLR Lens Discussion
07-18-2014, 06:31 AM
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The DA 60-250mm f/4 ED [IF] is a very good lens itself, though if you can manage to find a second hand Sigma 100-300mm f/4 APO EX DG then by all means get it. The one big advantage the sigma 100-300mm has over the Pentax DA60-250mm is that it is internal focusing an zooming, so the physical dimensions of the lens do not change. This means the center of balance doesn't shift which is useful when you are hand holding the lens and it also limits the possibility of dust and water getting into the lens.
Pentax K7 - Sigma 100-300mm f/4 APO EX DG - ISO 400 f/11 1/250th |
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Forum: Pentax SLR Lens Discussion
07-17-2014, 09:44 PM
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I agree, although I have no personal experience with this lens I do know it isn't optically as good as the sigma 100-300mm f/4 APO EX DG it is still a highly regarded lens. Most old telephoto primes have image quality issues when used on modern DSLRs like the Takumar 400mm f/5.6 - which can only deliver reasonable image quality at f/8~f/11 aperture range. Getting a more modern zoom lens is the best way to make the most of the money you have at your disposal.
Pentax K10D Sigma 100-300mm f/4 APO EX DG - ISO 200 1/125th f/5.6
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