EXCERPT page containing first few paragraphs. 2021-06-22 09:37:40
UA_SEARCH_BOT_null @ 18.104.22.168
For a general understanding of format equivalence, see Format-Equivalent Depth of Field and F-Stop.
Format equivalence quick summary, assuming 53.4 X 40.0mm IQ4 sensor vs 35mm*:
eDoF = equivalent Depth of Field
28mm f/4.5 ~= 19mm f/3.0 eDoF
35mm f/3.5 ~= 24mm f/2.4 eDoF
40mm f/4 ~= 27mm f/2.7 eDoF
45mm f/3.5 ~= 30mm f/2.4 eDoF
55mm f/2.8 ~= 34mm f/1.9 eDoF
80mm f/2.8 ~= 54mm f/1.9 eDoF
80mm f/4 ~= 54mm f/2.7 eDoF
110mm f/2.8 ~= 74mm f/1.9 eDoF
150mm f/2.8 ~= 101mm f/1.9 eDoF
240mm f/4.5 ~= 162mm f/3.0 eDoF
* Nominal 35mm sensor 36.0 X 24.0 mm. Some sensors are slightly smaller. Actual focal lengths of real lenses are often rounded, as are some f-stops e.g., f/5.6 is really f/5.657 ~= f/5.7.
Article continues for subscribers...
Diglloyd Medium Format is by yearly subscription. Subscribe now for about 33 cents a day ($120/year).
BEST DEAL: get full access to ALL 8 PUBLICATIONS for only 68 cents a day ($249.95)!
These systems are hugely expensive, so make the right choice for your own needs (full frame vs medium format).
- In-depth lens evaluations covering behaviors not likely to be found anywhere else, based on real-world field shooting.
- How to configure menus and buttons and best operating practices, gotchas and how-to.
- Real world examples with insights found nowhere else. Make sharper images just by understanding lens and camera behaviors.
- Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to 100 megapixels filling up to 5K display, plus large crops.
- Aperture series from wide open through stopped down, showing the full range of lens performance and bokeh.
- Optical quality analysis of field curvature, focus shift, sharpness, flare, distortion, and performance in the field.