Photography/Astronomy Equipment Reviews

Micro Four Thirds (M43) Systems

Olympus M.Zuiko ED 25mm f/1.2 PRO Lens Review

MTF50 and Bokeh for 25mm Micro Four Thirds Lenses

Panasonic Lumix G X Vario PZ 14-42mm f/3.5-5.6 Lens

Olympus 75mm f/1.8 Lens

Panasonic Lumix G X Vario 35-100mm f/2.8 Lens

Panasonic Lumix G Vario 12-60mm f/3.5-5.6 Lens

Panasonic Lumix G Leica Noctictron 42.5mm f/1.2 Lens

Olympus M.Zuiko ED 12-40mm f/2.8 PRO Lens


Canon EF 16-35mm f/2.8L II USM Lens Compared to EF 16-35mm f/2.8L USM

Canon EF-S 17-55mm f/2.8 IS USM and Canon EF-S 17-85mm f/4-5.6 IS USM Lenses
- - Compared to Tamron 17-50mm f/2.8 XR LD, Sigma 18-50mm f/2.8 EX DC Macro and Canon EF-S 18-55mm f/3.5-5.6

Canon EF 17-40mm f/4L USM Lens

Canon EF 24-70mm f/2.8L and Canon EF 28-70mm f/2.8L Lenses

Canon EF 24-105mm f/4L IS Compared to EF 24-70mm f/2.8L and EF 28-135mm f/3.5-5.6 IS Lenses

Canon EF 24mm f/1.4 L USM Lens

Canon EF 28mm f/1.8 USM Lens

Canon EF 35mm f/1.4 L USM Lens

Canon EF 50mm f/1.0L USM Lens, EF 50mm f/1.4 USM Lens, EF 50mm f/1.8 II Lens

Canon EF 50mm f/1.2L USM Lens

Canon EF 28-135mm f/3.5-5.6 IS Lens Compared to Other Zoom and Primes Lenses

Canon EF 85mm f/1.2 L II (Mark II) Compared to Mark I Lens and to Canon EF 85mm f/1.8 lens

Canon EF 85mm f/1.8 lens/ Canon EF 100mm f/2 USM lens and Canon EF 135mm f/2 L USM lens

Canon EF 70-200mm f/2.8 L IS USM lens

Canon EF 70-300mm f/4.5-5.6 DO USM lens

Canon EF 200mm f/1.8 L

Canon EF 300mm f/4L IS USM lens

Canon EF 400mm f/5.6L USM lens

Canon APS-C Camera (Canon 400D Digital Rebel XTi) Portrait Lens Test Images

Bokeh and Background Blurring with Canon Lenses

Nikon D80 Portait Lens Test Images

Digital Bodies

Canon EOS-1Ds Mark III

Canon EOS-40D

Canon EOS-7D


Takahashi Epsilon-130D (E-130D)

Planetary Observing with 5mm Eyepieces: Pentax 5mm XO; Baader 5mm Orthoscopic; University Optics 5mm Abbe Orthoscopic and 4.8mm Super Abbe Orthoscopic

Astrophotography: Evaluation and Review of the Takahashi EM-11 and TSA-102 as a Light Weight, Airline-Transportable System for Visual Astronomy and Astrophotography

Astrophotography: Building an Eyepiece Holder for Canon EF Lenses Using a Rear Lens Cap

Optical Encoder and Argo Navis Computer Installation on 18" Starmaster Dobsonian Reflector Telescope


© 2001-2013, W.L. Castleman