Out of interest I posted what would be a good legacy lens for a Sony Nex 6 (APSc 16.1 mp Exmor sensor lightweight camera - $815).
Here are the responses I got:
•Sigma 8-16mm (manual focus on LA-EA1)
•Mamiya/Sekor 55mm f/1.4
•Tamron SP Macro 90mm f/2.5
•Minolta AF D 75-300mm f/4.5-5.6 (on LA-EA2)
Minolta MD Rokkor-X 50mm f1.4
E mount SEL 35/1.8, then 10-18mm/4 and Olympus OM 100/2
On a Nex-6, I would rank these lenses by achievable IQ:
1.RF: Contax G, Zeiss ZM, even Voigtlander (ignoring Leica) all deliver stunning IQ
2.E-mount: SEL24F18Z
3.E-mount: Sigma 30
4.E-mount: SEL35F18 OSS and SEL50F18 OSS
5.A-mount: prime lenses (A35, A50, A85)
6.E-mount: Sigma 19 (and likely SEL20F28)
7.Legacy: Olympus OM, Minolta MD, Nikon AFi, Canon FDn prime lenses
8.Zoom: SEL18200 OSS
9.Zoom SEL1650P OSS or SEL1855 OSS
Sizewise - Summicron 40mm F2
Nex native lens - 24F18
Legacy lens - Elmarit 60mm
Alpha mount - Sigma 24-70
Price with performance - FD 70-150 f3.5
Leitz Macro-Elmarit-R 60mm 1:2.8
Viogtlander 21mm F4 colour scopar
The Voigtlander is F4 but it may still be good as it probably is good wideopen.
Greg.
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