Love the 1.7 in Camera Crop

[RichDitch]

First, it is a nice image of the moon. Good lighting direction on the moon to bring out the craters.

With the latest K-3iii firmware, you can apply a x1.7 crop mode in camera, like an external x1.7 TC but without the TC's aperture changes (as far as I understand it).

Assuming this is like Nikon's long existing internal crop all the 1.7x does in this Pentax is throw away the outer pixels that you would see if the 1.7x mode was not being used. You can get the same result by shooting without the 1.7x engaged and then cropping the full image.

I used the 1.7 in camera crop mode on the K3III ie not a TC - it's much better.

A TC spreads the light from the lens and covers the entire sensor in the camera. If you used a1.7x TC instead of the internal 1.7x crop your result would be the same coverage but with more pixels. The effective aperture changes with the TC because the light is spread out.

Since your Pentax has an APS-C sized sensor you have a 1.5x crop factor from that times the 1.7x factor from the firmware for effectively an overall crop factor of 2.55x compared to a full frame camera.

 

[Ozdean]

Glad you them FG

 

[Ozdean]

First, it is a nice image of the moon. Good lighting direction on the moon to bring out the craters.

Assuming this is like Nikon's long existing internal crop all the 1.7x does in this Pentax is throw away the outer pixels that you would see if the 1.7x mode was not being used. You can get the same result by shooting without the 1.7x engaged and then cropping the full image.

A TC spreads the light from the lens and covers the entire sensor in the camera. If you used a1.7x TC instead of the internal 1.7x crop your result would be the same coverage but with more pixels. The effective aperture changes with the TC because the light is spread out.

Since your Pentax has an APS-C sized sensor you have a 1.5x crop factor from that times the 1.7x factor from the firmware for effectively an overall crop factor of 2.55x compared to a full frame camera.

1.7 in camera crop gives me the best results by far.

 

[Dino26323]

1.7 in camera crop gives me the best results by far.

The results look very good. That moon shot is good certainly.

I routinely use my 1.4 converter for various things. The loss in sharpness is not much but YMMV and / or your opinion.

Regards Dino26323

 

[Ozdean]

The results look very good. That moon shot is good certainly.

I routinely use my 1.4 converter for various things. The loss in sharpness is not much but YMMV and / or your opinion.

Regards Dino26323

Glad you liked it Dino.