Photography Wiki
Advertisement

A cheap alternative to long lenses over 500mm are mirror lenses.  Cost effective, light, and extremely portable, mirror lenses have become popular with amature photographers who operate on a tight budget.  One drawback of mirror lenses are the unusual bokeh or blurry circles. 

Telephoto Zoom Lenses[]

Lens Price Image
Sigma 200-500mm f/2.8 $26,000
551435.jpg
Tamron 200-500mm f/5-6.3 $1000
335378.jpg

Mirror Lenses[]

Lens Price Image
Vivitar 650-1300mm f/8 $230
885033.jpg
Pro Optic 500mm f/6.3 $160
ProOptic-500mm-f-6.3-Mirror-Lens-Test.jpg


Bokeh[]

A typical lens provides a smooth bokeh, usually a solid round circle.  Bokeh from mirror lenses provide a hollow circle, almost like a doughnut.  Compare the two images below.  Notice the top image has smooth colored circles while the botom image has a large group of "doughnuts."



18-55mm lens bokeh

Mirror Lens Bokeh.

Advertisement