It depends.if you feel like i don't understand how to compare the equipment , you might just be nice and educate me. You don't have to shout and scream. I was not offensive, so I don't need any of your attitude. I am still learning and every perspective is worth considering.
So i looked at your photos again. In your comparison you have different fstop, shutter speed and iso. Is this a good way to compare?
Are you wanting to see real life scenarios that you would likely shoot? Or maximum sharpness? Depth of field? Perspective? High ISO? Pick one or maybe two and then we can make some comparisons.
Here's the problem - you can't simply shoot a D90 and D610 and have perfectly identical images, all settings equal, the different sensor size forces changes.
I was specifically shooting 35mm on DX vs. 50mm on FX because it's more or less the same field of view - relevant for my real world shooting. If I'm in my living room taking pics the 2 setups (D5100+35 and D610+50) give me the same field of view meaning I can take the shot from the same distance and get roughly the same field of view. I purposely chose 2 lenses that were similar in performance. It's not like I'm shooting the 18-55 lens vs. a $2000 prime here. Problems are: if I shoot the same f-stop I get shallower depth of field with the D610, do I want shallower depth of field or the same depth of field for my comparison? If I stop the D610 down by a stop I'll get similar depth of field but now I'll get a slower shutter speed, is that OK? Or should I raise the ISO by a stop to compensate... but now I'm shooting ISO 1600 vs ISO 800... do I care about that?
Or, like the previous poster I just ranted at
When I rented the D610 I mostly shot with different lenses (or different focal lengths) that essentially gave me the same shot. Why? Because that reflects my real world experience with how I shoot. I did what I considered a fair job of comparing pretty equal lenses (again, no $100 bums against $2000 super sharp legendary lenses). Example: if I'm taking a landscape shot down at the beach of a beautiful sunrise, I figure out where I want to put the camera/tripod, what my composition is, set an aperture for typically hyperfocal distance or infinity focus and get my pic. If I were to plop a FX camera on the tripod in the same spot with the same focal length I get a completely different shot due to the 1.5 crop factor of the DX camera. So that doesn't work for me. Same thing with shots of the family indoors.
It's not easy to perfectly compare more than 1 aspect (ISO, depth of field, sensor resolution) at a time. Especially if real world photography is of interest to you.
At the end of the day you are going to get a small but noticeable improvement in dynamic range, resolution/sharpness, ability to shoot shallower depth of field, ability to shoot higher ISO. Only you know your shooting style and which of those are important and which aren't, for example, for someone that always shoots landscapes on a tripod is high ISO performance the most relevant criteria? How about for a handheld street shooter that leaves at ISO1600?
Sorry for the long winded response and the aggressive post earlier. I guess I got a little offended when you blew off the other poster and blew me off as well (as we were both essentially just trying to help). I have dozens of side by side shots but how much do you think I'm interesting in helping at the moment (vs. arguing... which I seem to have the energy for, LOL).



