Friday, December 21, 2018

Promaster Spectrum 7 100-300mm f/5.6-6.7


The Promaster Spectrum 7 100-300mm f/5.6-6.7 MC Tele Macro is a telephoto zoom lens for 35 mm SLR cameras.  The one I own has a Pentax K-mount and was mounted to my Samsung NX1 using a Fotasay adapter.


Given a 1.5 crop factor for the NX1's mirrorless system, that makes this lens a 450mm equivalent.  Let's see how the lens performs from the photos below.


 100mm Focal Length   f16  /  1/100 sec  /  0EV  /  ISO100

    ....and zoomed-in below:

           300mm Focal Length   f16  /  1/100 sec  /  0EV  /  ISO100 


 200mm Focal Length   f8  /  1/60 sec  /  0EV  /  ISO100