آقا شاهین عزیز, قبل از ادامه بحث متن زیر را بخوانید:
For an equivalent field of view, the small-sensor camera has at least 1.6x MORE depth of field than a full-frame camera would have - when the focus distance is significantly less then the hyperfocal distance (but the full-frame format need a lens with 1.6x the focal length to give the same view).
Using the same lens on a small-sensor camera and a full-frame camera, the small-sensor image has 1.6x LESS depth of field than the full-frame image would have (but they would be different images since the field of view would be different)
If you use the same lens on a small-sensor camera and a full-frame camera and crop the full-frame image to give the same view as the digital image, the depth of field is IDENTICAL
If you use the same lens on a small-sensor camera and a full-frame camera, then shoot fromdifferent distances so that the view is the same, the small-sensor image will have 1.6xMORE DOF then the film image.
Close to the hyperfocal distance, the small-sensor camera has a much more than 1.6x the DOF of a full-frame camera. The hyperfocal distance of the small-sensor camera is 1.6x less than that of a full-frame camera.
به نظر من این شبهه از آنجا شکل میگیرد که برای به دست آوردن کادر مشابه با سنسورهای متفاوت مجبوریم فاصله دوربین با سوژه را تغییر بدهیم؛ که خود فاصله دوربین از سوژه تاثیر در عمق میدان وضوح دارد.
در ضمن مثال کراپ کردن عکس یک مثال عملی و جالب بود که جناب وحید فرمودند.
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منبع متن انگلیسی و اطلاعات کاملتر در:
کد:
http://photo.net/learn/optics/dofdigital/