A novel tool for astro work? - Sigma 65mm F2 DG DN Contemporary Astrophotography Review
19:39
Am I doing this right? - Sigma 20mm F2 DG DN Contemporary Astrophotography Review
14:15
Voigtländer 65mm F2 and Sigma 65mm F2 DG DN Dual Lens Review
32:09
Is this Legend all hype? - Sigma 40mm F1.4 DG HSM ART Astrophotography Review
13:49
É por isso que você não tem Nitidez!
33:05
Do this with ANY Budget Digital Camera - HDR Photography (plus full landscape editing tutorial)
20:02
Sigma's 24mm f/3.5, 35mm f/2 & 65mm f/2 "I" Series DG DN Lenses: End-Stage Pixel Peeping?
27:20
Yet another HUGE 135mm lens: Viltrox AF 135mm F1.8 LAB FE Astrophotography Review
8:02