CarstenKostrzewa

Indeed you are right. The simplified calculation is only valid, when the background is far away. I personally would consider the estimation to be good enough, once the background distance is let's...

I personally would not discount the ability of this camera to control DoF (and I actually mean background blur). Besides the fast lens, the zoom reach is also a bit longer than for the rest of the...

In terms of bakground blur at 90mm equiv. the G1 X and the LX7 are pretty much the same (as you indicated small sensor/fast lens vs large sensor/slow lens) and the same should be true for shorter...

If you are interested in how background blur relates to aperture, sensor sized and distance and not just for compact cameras, you might want to take a look at the article I wrote here on dpreview:...

Yes, that's exactly what the article descibes (well actually the article is focused on the impact of different sensor size). Apologies for the FOV confusion. I was confusing it with the framing...

Your statements are both correct (expect for the "narrower FOV"), as well as the calculation above. The confusing part starts with the fact, that all the books and magazines start to explain...

Hi Steve,I am waiting since a couple of years for the camera you describe, but IMHO nothing has come close yet. The Canon S100 is pretty useless when it comes to controlling DoF or better the...

I 100% support that!
... or slightly bigger zoom AND aperture (i.e. 2.4)

I 100% support that!
... or if I could even ask for a little more: slightly bigger zoom (120 -140 mm equiv.) AND bigger aperture at maximum zoom (e.g. 2.4)

Yes agreed. I am hoping since a couple of years, that someone would take the risk and develop a enthusiast pocketable camera, with the right balance between IQ, sensor size, camera/lens bulk and...

I think this is not an easy question to be answered, but obviously as you state, the smaller the sensor, the smaller the lens. And if you want the have the same background blur (not the same DoF)...

Pocketable camera, capable to create some background blur in portrait situations:

- Sensor size of 1” or above (noise performance and background blur capabilities)
- f-number <= 2.4 at max zoom...

Thanks to all of you. I am happy to hear, that you think the article is helpful.

... which is you ask me is exactly formula I used, as b is in in image space and ms which is the Image Magnification.Anyway ... thanks a lot for your thoughts.BRCarsten

I guess added some thoughts regarding the above into the other post. Please have a look over there.BrCarsten

Thanks for your comments as well. This helps to challenge what I wrote.First my apologies. The 3rd bullet should have said: "subject distance s is smaller than hyperfocal distance H", which then...

Unfortunately I am not familiar with Merklinger's model. If you however take the formulas I have used in the previous posts and define the spot size you mentioned to be the normalized blur spot...

I am afraid I was not able to completely follow. Let me maybe briefly explain what I did.Maybe to start with a first general comment. The article I was referring to, is actually my own article,...

Thanks, Michael!
And the additional point you added is indeed a very interesting aspect, I have never thought about before. Thanks.
Carsten

I was always confused about exactly the same thing and as a result started to take a deeper look into it. IMHO I found a solution, i.e. getting rid of confusing DoF formulas and rather describe the...