Home · Register · Search · View Winners · Software · Hosting · Software · Join Upload & Sell

My posts · My subscriptions
  

  Previous versions of AJSJones's message #12097759 « Review: Sony A7R teams up with Canon glass »

  

AJSJones
Offline
Upload & Sell: Off
Re: Review: Sony A7R teams up with Canon glass




snapsy wrote:
skibum5 wrote:
AJSJones wrote:
dfresh wrote:
Thanks for taking the time to do this Fred! Out of curiosity, you mentioned that you don't notice the moire on the A7R dome sample, but to my inexperienced eyes it is clearly visible there and not present on the 5D3 sample. What am I missing?

The 5D3 has it, the A7R doesn't - that was the surprise


LR tends to show color moire from Canon DSLR

but yeah surprising not to be seen on the A7R shots


Moiré occurs when a scene contains detail whose frequency is above the sensor's nyquist frequency sampling (1/2 nyquist to be precise). Since the A7r has more MP it has a higher nyquist, thus Moiré can appear on the lower density sensor and not the higher density sensor when the frequency of detail is above the lower density sensor's nyquist but below the higher density sensor's nyquist.

That would be more reasonable if the 5D3 didn't have an AA filter and the Nyquists were really different but neither of those is true. That was the (precise) surprise.



Jan 29, 2014 at 05:55 AM



  Previous versions of AJSJones's message #12097759 « Review: Sony A7R teams up with Canon glass »