Will there be any significant performance with FX lenses vs. DX lenses on a D300? (Page 2): I suggest you just shut up unless you can find information that says it differently.

Mark7829 Loc: Calfornia

MT Shooter wrote:

Gee, more idiot remarks from our resident moron. What a surprise. Haven't taken that remedial reading class yet I see. Go away and take your incompetence with you.

I suggest you just shut up unless you can find information that says it differently. However, just as I expected. You could not provide anything constructive, to validate or verify. Where do you come up with this crap?

Come on, verify and validate. Everyone here should be watching this.

RDH

[quote=Mark7829]I don't find any empirical evidence to support that. Can you post where you got that or did you just make that up. Tony Northrup posted a video on this very issue from information found on DxO labs. The findings are that it is better to use crop sensor lenses on crop sensor cameras. DxO Labs has consolidated information from the standard MTF graphs for lens performance into the what they label Perceptual MPix or P-MP for sharpness. The higher/better scores are rendered when the crop sensor lenses are on crop sensor camera and not when full frame lenses are on crop sensor cameras. Another member has provided you a link below. I noticed you did not respond to it.

Few of us believe Northrup is worth replying to.

Mark7829 Loc: Calfornia

MT Shooter wrote:

Gee, more idiot remarks from our resident moron. What a surprise. Haven't taken that remedial reading class yet I see. Go away and take your incompetence with you.

As for proof, it's called MTF Charts. Check them out if you ever learn to read anything.

Nahhh, wrong answer. Actually that no answer, a rather pathetic answer. I doubt you even know how to read and compare MTF charts. Come on, list a scientific lab that can verify what you said. . DxO labs apparently disagrees. You put out garbage and expect others to buy into it -- not happening. Come on - prove it. Or click on "UNSUBSCRIBE".

Mark7829 Loc: Calfornia

[quote=RDH]

Mark7829 wrote:

Few of us believe Northrup is worth replying to.

Tony is what he is however in this instance he is just providing information from DXO Labs. DxO does not back up MT Shoot-face's assertions.

photon56 Loc: North America

Robby418 wrote:

Recently upgraded and acquired a D750 body and presently researching for FX lenses. I have a D300. Will full frame lenses be an improvement/advantage on the D300 versus lenses designed for DX format sensors? Thinking about trading in & up for FX lenses to consolidate.Your thoughts/opinions,thanks.

No. It all depends on the abilities of the shooter.

imagemeister Loc: mid east Florida

Mark7829 wrote:

I don't find any empirical evidence to support tha... (show quote)

I usually agree with TN - but NOT on this youtube video ! First of all, DXO mark's methodology is very suspect - as are any conclusions drawn from them- and as are TN's conclusions ! Anything put out by DXO mark should be viewed in a very narrow context and not broad generalities.

imagemeister Loc: mid east Florida

TN puts way too much credence in DXO mark numbers - as do most people ! They do have SOME relevance - but certainly not absolute relevance !

Mark7829 Loc: Calfornia

imagemeister wrote:

TN puts way too much credence in DXO mark numbers - as do most people ! They do have SOME relevance - but certainly not absolute relevance !

Yes, I too am skeptical but when you read the explanation on how DxO uses MTF data, it becomes credible. DP Review, which I find to be outstanding has partnered with DxO to provide data for DP's publications. If not DxO who else? As for the MT Shoot-in-foot's assertions, I can not find a lab out there that can substantiate.

imagemeister Loc: mid east Florida

Mark7829 wrote:

Yes, I too am skeptical but when you read the explanation on how DxO uses MTF data, it becomes credible. DP Review, which I find to be outstanding has partnered with DxO to provide data for DP's publications. If not DxO who else? As for the MT Shoot-in-foot's assertions, I can not find a lab out there that can substantiate.

I do put a lot of faith in LensRental's work and presentations - an example - http://www.lensrentals.com/blog/2015/07/supertelephoto-mtf-curves .......

Mark7829 Loc: Calfornia

imagemeister wrote:

I do put a lot of faith in LensRental's work and presentations - an example - http://www.lensrentals.com/blog/2015/07/supertelephoto-mtf-curves .......

What Lensrental does is surely in line with what DxO does. When you look at the MTF graphs, there are multiple lines for different measures. DxO consolidates that information into a single graph in what they define as Perceptual Megapixels. When they took a full frame lens and put it on a crop sensor camera, the scores were not as good as a crop sensor lens on a crop sensor camera. MT indicates that the crop uses only the center and sharpest portion of the full frame lens and he says you would get a better image but according to DxO that is not true. When a crop sensor lens is used on a crop sensor camera 100 % of the light from the lens cover 100% of the sensor. That is not true when a full frame lens is placed on a crop sensor camera.

I don't think MT did his homework. I am not finding anyone out there that can validate Shoot-faces claims. DxO refutes it.

imagemeister Loc: mid east Florida

Mark7829 wrote:

DxO consolidates that information into a single graph in what they define as Perceptual Megapixels.

This is one of the things I have a problem with .....

Mark7829 Loc: Calfornia

imagemeister wrote:

This is one of the things I have a problem with .....

It really is not a bad way to go. It consolidates the information into a single score making it so much easier to make comparisons. Logically that is what you are trying to achieve anyway. Is it averaging? Likely it is some of that.

imagemeister Loc: mid east Florida

Mark7829 wrote:

When they took a full frame lens and put it on a crop sensor camera, the scores were not as good as a crop sensor lens on a crop sensor camera.

There are some specific cases of this - but not enough to form a generalization IMO - even IF you do buy into DXO mark's numbers. In the case of the TN video, he compares a very late design Sigma 2:1 high speed DX zoom with an older design 3:1 FX zoom - DAH !

I really do not think you can make general statements either way for or against full frame lenses on crop frame sensors as regards IQ - and, in the case of telephotos - there is no choice anyway !

sinatraman Loc: Vero Beach Florida, Earth,alpha quaudrant

guys, photography is supposed to be an art form, not a whole bunch of science physics mumbo jumbo. Cut to the chase does any of this junk actually affect the photos you take so that people would notice? I doubt it. Who cares about this except for some science tecno nerds.

I use both dx and fx lenses on my d300 and found no problems. Off course I don't zoom in and check each pixel, too OCD for me. If you want fx lenses at a good price, rermember all those lovely Nikon lenses from the film era. Guess what, they all are fx equivilant

romanticf16 Loc: Commerce Twp, MI

Robby418 wrote:

Recently upgraded and acquired a D750 body and presently researching for FX lenses. I have a D300. Will full frame lenses be an improvement/advantage on the D300 versus lenses designed for DX format sensors? Thinking about trading in & up for FX lenses to consolidate.Your thoughts/opinions,thanks.

It would depend on the quality level of the FX lenses you buy. Like anything else, there are pearls and grits of sand to be had. Some 40 year old FX lenses from the film era are pearls. Some newer ones aren't too good. Use SEARCH to look for specific lenses or read tests from several sources listed in posts here as a guide.