To Be or Not To Be (as for to have or not to have...)
|Olympus M.Zuiko 14-42mm @ 42mm, 1/125sec F5.6 ISO200 Monochrome|
|Panasonic Lumix G Vario 12-32mm @ 32mm, 1/125sec F5.6 ISO200|
How can we definite mid-range deep-of-field (Mid-DOF)? Anything between two extreme: almost no deep-of-field or about infinite deep-of-field like in landscape photography. So Mid-DOF can be assimilated as an intermediate area between the closest and the longest(or infinite) distances. Most lenses for compact camera format (M4/3, APS-C and 24 X 36mm called wrongly "full-frame") if not all have the ability to do mid-range deep-of-field by using their smaller aperture settings such as F4.0, 5.6, 8,0 or 11.
|Panasonic Lumix G Vario 35-100mm @ 100mm, 1/800sec F7.1 ISO 200 Monochrome|
If you are facing many various picture taking conditions it is good to rely on a certain deep-of-field margin. This "safety gap" ensure you that critical focusing is at least obtained for the principal subject especially considering its volume aspect for example on a face, on objects with incrustations, etc. Sometimes you won't be able or you will simply forget to double check the full clarity of your subject. This is why a mid-range deep-of-field will play as an insurance for your final image results.
Optical quality pick of the lens
Rarely you will get the optimum quality of your image by using the maximum aperture available on the lens. Furthermore we know already that the diffraction phenomena for an optics will appear by using its minimum aperture. So the best output will be registered in selecting the medium aperture such as F4.0, F5.6 or F8.0 on many lens model or even at F2.8 with lenses doted of a larger maximum aperture (F1.7, F1.8, F2.0).
Lens models that are designed with a more moderate or modest maximum aperture are reckoned to be more compact and lighter package a big advantage if you have to carry them extendely. Their smaller size mean also more discretion or less intimidating aspect. All these consideration of better mobility and less carrying fatigue will be fully appreciated for your street or traveling photo projects or any other situation that required an additional effort from your part.
Good pricing on your part
Many moderate maximum aperture lens models are far less expensive compare to their "Pro" counterparts. Often they are available on special selling package with the camera at a ridiculous add-on price tag. I can recommend you without any doubts the Olympus M.Zuiko 14-42mm F3.5-5.6 II R & 12-50mm F3.5-6.3 EZ or the Panasonic Lumix G Vario 12-32mm & 12-60mm both F3.5-5.6 OIS or the Fujifilm Fujinon XF 16-50mm F3.5-5.6 & 18-55mm F2.8-4.0 both OIS which are all excellent optical tools.
|Panasonic Lumix G Vario 12-32mm @ 32mm, 1/320sec F5.6 ISO200|
A picture should tell a story and that story can be very limited when you are selecting a very narrow deep of field or on the contrary the story can be very long (translate boring) if you choose an infinite deep of field. Something in between could be the best thing to do... The choice is yours but a mid-range deep of field choice is certainly on your side. And the beauty of this is already available on the most affordable (kit) zoom lenses.