Erot

Erot

Lives in Germany Germany
Joined on Nov 8, 2007

Comments

Total: 2, showing: 1 – 2
On Sony DSC-RX100 preview (544 comments in total)
In reply to:

Erot: Looking at the comparison table the column "Aperture range (equiv.)" is very interesting. It shows beside the possible most narrow DOF also the light gathering capability of lens-sensor-comibination.

At the short end of the zoom the Sony has the best value (4,9). So the Sony is more capable to take pictures at available light than all other cameras in the table, including the Nikon D3200 with the kit lens.

But at the long end of the zoom the RX100 shows a completly different behavior. The aperture value 13,4 (at 100 mm equiv.) is worse than the G1X, XZ-1 and X10 (at 112mm equiv.). You have to rise the ISO setting at available light, so the picture will probably be more noisy than the other cams, depending on the performance of the sensor.

This seems to be a drawback of the compact conctruction.

@jonikon

You have misinterpred my post. I talked about "lights gathering", which is measured in "lumen", but not "lumen per unit".

At any given equivalent (!) aperture the total light gathered and the lumen value are always identical, independent of the sensor size. On a large sensor this results to low "lumen per unit", on small sensors to high "lumen per unit". Compensating the different brightness on the sensor by adjusting the ISO setting leads to nearly the same noise in the image, depending on the performance of the sensor.

This is the reason, why the "equivalent aperture" always gives a strong approach to the low light capability of a whole system (lens + sensor).

Direct link | Posted on Jun 8, 2012 at 10:09 UTC
On Sony DSC-RX100 preview (544 comments in total)

Looking at the comparison table the column "Aperture range (equiv.)" is very interesting. It shows beside the possible most narrow DOF also the light gathering capability of lens-sensor-comibination.

At the short end of the zoom the Sony has the best value (4,9). So the Sony is more capable to take pictures at available light than all other cameras in the table, including the Nikon D3200 with the kit lens.

But at the long end of the zoom the RX100 shows a completly different behavior. The aperture value 13,4 (at 100 mm equiv.) is worse than the G1X, XZ-1 and X10 (at 112mm equiv.). You have to rise the ISO setting at available light, so the picture will probably be more noisy than the other cams, depending on the performance of the sensor.

This seems to be a drawback of the compact conctruction.

Direct link | Posted on Jun 7, 2012 at 14:57 UTC as 105th comment | 8 replies
Total: 2, showing: 1 – 2