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Lens Promaster Spectrum 7 28-70 mm f/ 3.5-4.5

Collin Cutler :: 19.06.2017 06:21:11

lvl. 1 (Lens-Learner)

Lens Promaster Spectrum 7 28-70 mm f/ 3.5-4.5
Format: 35mm SLR

Type: Zoom lens

Focusing: Manual Focus (MF)

Lens mounts: Pentax K


Focal lengthMax. apertureMin. apertureBladesMin. Focus (m.)Filter Ø (mm.)Weight (gr.)Height (mm.)
28mm - 70mmf/3.5 - f/4.5f/3.560.552


Collin Cutler :: 19.06.2017 06:23:04

lvl. 1 (Lens-Learner)

I have a question. I have the exact lens for my Canon AE 1. The only problem is that I'm having trouble figuring out the depth of field from the numbers on the lens. It is different compared to my other, older lens. How do you figure out the depth of field if the lens doenst show you at that zoomed part? Any help would be appreciated. Thank you 

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