HKPiax

So, uhm, what the hell is going on with all these ad posts I’m seeing in this community?

Hi,

I'm trying to wrap my head around the rolling shutter effect, specifically why it happens.

I'm having a hard time understanding how the readout speed affects the image. If I understood correclty, when in electronic shutter mode the pixels are exposed as indicated by the shutter speed (e.g. at 1/1000 each pixel is exposed for 1/1000 of a second).

If the readout takes 1/100 s to scan the entire sensor, what happens exactly when I take the picture? Do the pixels start firing sequentially as the shutter speed dictates (i.e. 1/1000 s each, sequentially)? If that is the case, do they wait for the readout to catch up or do they continue firing? If the latter, by the time the readout reaches the second pixel, the eleventh pixel is firing, so there are 10 pixel between the one firing and the one being read. Does it work like this?

If the pixels are exposed for 1/1000 s and then turned off and their value stored, wouldn't that mean that the image should not be affected? I mean, they saw the subject for 1/1000 s and the motion should be frozen, they are just waiting for the value to be read. Just like if you asked 10 people to open their eyes for 1 second (shutter speed), one after the other, and draw what they see. They saw if for one second each, so at most the difference in the position of what they saw should cover 10 seconds. Then they can take hours to draw what they saw (readout speed), but what they saw specifically wouldn't be afftected by how long it takes them to draw it. Am I wrong here maybe?

Also, in general, why is mechanical shutter not as affected (if affected at all) by the rolling shutter effect? Does the sensor capture light differently when in mechanical shutter mode?

I just don't get it. I feel like I'm close to understanding why, but I still don't.

I know I'm probably weird for focusing so much on something technical like this, but it just bugs me so much.

Any help is greatly appreciated, really.

Hi everyone, although I like to study the photography topic, I'm really a noob when it comes to practical terms.

I would like to take pictures at a family event which will take place in a garden in the evening/night.

Well, my gear is quite modest, and I know I don't have what I need to take good pictures of both the place and the people there. I'm looking to rent a nice lens to carry around as I take pictures (and enjoy the party too! So I'm just taking one 😅). So I would really appreciate some advice on what to rent.

There are the four lenses I found while digging, two are primes, two are zooms:

• Canon RF 24MM F/1.8 IS STM: it's fast, with IS, but I'm not sure about portraits with this focal length.

• Canon EF 24mm f/1.4 L II USM: super fast, no IS, still not sure about portraits with this focal length.

• Canon EF-S 17-55mm f/2.8 IS USM: IS, quite fast, zoom lets me take portraits, but I've read it's not very sharp.

• Canon RF 15-35mm f/2.8 L IS USM: IS, quite fast, zoom lets me take portraits (not strongly as the one above but still).

Here's my situation:

• I have Canon Eos R10 with the EF adapter.
• My hands are shaky, so without IS I need to be at least at 1/125...
• I like to keep ISO really low (<6400) if I can.
• I kind of pixel peep (I know I don't have the right because I'm crap but I can't resist) so I like to take as sharp pictures as I can.

Which lens would you reccommend? Since I'm renting them I was thinking about going all in with the expensive ones, the cost won't increase much. The primes are so bright I feel comfortable they will be bright enough, but I don't know if I can take good portraits at 24mm. On the other hand, zooms let me do more things, but I don't know if I can handle f/2.8 with my crappy and shaky hands.

Of course, if you can think of other lenses that would be perfect for the job I'm all ears!

Cheers