Any Advantage to Full Frame?

Started Aug 26, 2014 | Questions thread
Jack Hogan Veteran Member • Posts: 6,160
Objective facts get in the way of subjective opinions
1

Reilly Diefenbach wrote:

Hey Reilly,

Jack Hogan wrote:

Part of using information from the net is understanding whether the data is useful for the application at hand based on the quality and reliability of the source.

The site you refer to is known not to be a good resource when comparing spatial resolution performance apples to apples. They admit to not having the time to focus cameras properly nor do they set them up Equivalently.

Known by whom, I wonder? I'm pretty sure Dave Etchells would not agree that the IR methodology is as sloppy as you would have us believe.

by Dave himself or whoever responded to the question asking for clarification in their methodology section: they said clearlly that they do not have the time to focus peak every image they take. I can confirm that , having taken a close, quantitative look at some of their raw captures.

Lenstip.com and DxO are more scientific in their approach, try harder and give more reliable results. Lenstip's results are reproducible and easy to understand. Find me a decently priced lens whose MTF50 exceeds 66 lp/mm on a DX body at f/4 at lenstip.com and I'll go out and buy it.

I care not one whit for mtf charts, only what a given camera or lens can put up on my screen. Imaging Resource raws are the gold standard for determining camera body resolution. The IR raws show conclusively that there is little or no substantial difference in raw resolution at ISO 100 between the D7100 and the D610.

When making hardware choices I prefer to deal with objective, quantitative data about the hardware unencumbered by subjective calls on processed images: otherwise the ensuing discussion tends to degenerate into a tedious at best 'you are blind - no you are blind' unending exchange. But since you mention it, and with all the disclaimers above, the D610 does look a little sharper in the example shown.

IR is good for many things for the average bloke. Comparing spatial resolution capabilities across cameras is not one of them in my experience.

Jack

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