d7100

[holty]

looking at a review of the d7100 am i right in thinking that the crop factor is 1.3 ??

 

[Ivan S]

1.5x, but will also do 1.3x, a crop camera that can do another crop, when using 1.3x you use 15.4 mega pixels of the sensor instead of the 24.1 in 1.5x crop.

 

[GPT]

As Ivan says it is a DX camera which means the crop factor is 1.5

The 1.3 crop mode is in addition to the 1.5 crop so in reality it makes the overall crop factor roughly equivalent to 2 (1.5 * 1.3 = 1.95).

 

[holty]

As Ivan says it is a DX camera which means the crop factor is 1.5

The 1.3 crop mode is in addition to the 1.5 crop so in reality it makes the overall crop factor roughly equivalent to 2 (1.5 * 1.3 = 1.95).

im still in the dark , do you mean you can switch between 1.5 and 1.3 crop ?? or you can add them together to get nearly 2 times factor
or are you saying its a 2 times crop factor all the time ??
sorry for being a bit thick i think that comes from living with a blonde wife

:bang::bang::bang::bang:

 

[Ivan S]

Yeah, it can switch between the two crops, normal being 1.5x and then if you want to crop in a bit closer 1.3x, but it can also be done in software, it's kind of a useless feature tbh.

 

[Porsupah]

Yeah, it can switch between the two crops, normal being 1.5x and then if you want to crop in a bit closer 1.3x, but it can also be done in software, it's kind of a useless feature tbh.

That crop can be performed after the event, but benefits of using the 1.3x crop mode that come to mind:

- faster continuous shooting
- smaller files, so you save space on the card, and on your drives; with full size 14-bit RAWs on a D7100 weighing in around 30MB each, it's easy to chew through disk space.

It all depends on what kind of photography you engage in. Many folk may never use rapid bursts, but in a rapid wildlife moment, that extra frame can be just the ticket. Usually, if I engage crop mode, it's because the subject's far enough away that there's simply no point capturing pixels I'll only throw away later - for extra continuous speed, I'll tend to enter 12-bit mode instead.

 

[HoppyUK]

It's not a 1.3x crop factor like Canon's 1D-series, if that's what you were thinking. In round numbers, Nikon's DX format is 1.5x, and the D7100's extra 1.3x crop mode makes it 2x relative to full-frame - similar to 4/3rds format. The main benefit being the increased frame rate, as it can buffer less data more quickly.

Actual figures are 1.53x (23.5x15.6mm sensor area, 6000x4000=24.0mp) and 1.91x (18.8x15.5mm, 4800x3200=15.4mp).

 

[rob-nikon]

ive used the crop mode a couple of times but I use centre point focus and crop it to the composition I want using the 24mp sensor.although this means im capturing larger files it means i can choose the composition later. i mainly do this for birds in flight where the faster, more acurate centre area focus points are better to capture acurate focus. there is plenty of mp to slightly crop and still give a good sized file.

the benefits of the crop mode for higher frame rate,small size file are good when subjects are further away and dont fill the frame.im going to photograph Ospreys in a few weeks and i can see me using the crop mode as they are so much further away and the extra frame rate will help.