Wild Mark's Album: 450mm challenge - PentaxForums.com

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450mm challenge

I tested four lenses wide open and at f8 (ISO200) on the K3

Pentax F*300mm f4.5 + 1.4X Tamron TC
Sigma 100-300mm f4 + 1.4X Tamron TC
Sigma 150-500mm
Sigma 50-500mm

Results were informative

Sigma50 500f6.3 f8

Centre
Open = ranked #4

Border ranked #3

Sigma50 500f6.3 f6.3

Centre
Open = ranked #4

Border ranked #3

Sigma100 300f4 f8

Centre
F8 = ranked #1

Border ranked #3

Sigma100 300f4 f4 TC

Centre
Open = ranked #1

Border ranked #3

Sigma150 500f6.3 f8

Centre
F8 = ranked #3

Border ranked #2

F300*f4.5 8 TC

Centre
F8 = ranked #2

Border ranked #1

Sigma150 500f6.3 f6.3

Centre
Open = ranked #3

Border ranked #2

F300*f4.5 4.5 TC

Centre
Open = ranked #2

Border ranked #1

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