Your content is always interesting and sublimely well produced. Everything from the images,editing,slides with information and especially your voice and style. I have watched many and more than 10 times each.Thanks for your outstanding contributions which are very helpful to the millions of photo enthusiasts around the world who are using budget cameras and lenses.For people like me who live is Brazil cameras etc are very expensive. My used Nikon D3300 was more than a months salary.Thanks also for showing us that great photos can be taken with the lenses and cameras that you review and test.
Thank you for doing this test, and more for the structure and to-the-point nature of the video I'm going to take a look at the rest of your videos since in my eyes you deserve the support.
hi Tom, That really caught my interest as 1) I own Nikkor 50mm 1.8 G 2) have other lenses known for big variation in quality e.g. Fuji 18-55 kit - and was wondering about objective sharpness of my copies. I run your basic script using cv2.Laplacian and it returns values from 100-2000 though. For this specific 50mm test, do you normalized the output somehow to 0-100?
Hi Andy! Thanks for asking. If you do not want absolute values (you are not directly comparing two lenses but would rather want to compare the shapes of their sharpness graphs) then you can divide all values of the series by the max value. This way you'll bring all values between 0 and 1. Kind regards!
It would have been great to see comparisons of the pictures, even pixel peeping, to see if the measured change in sharpness results in perceptibly worse photos. I can understand a quantifiable experiment, but determining how it affects your ability to capture would be much more valuable than the raw calculated sharpness values.
Hi Kyle! Thank you for making this valid point. I did not see any visual differences between the lenses, so I did not show the photos. However I fully get your point. Maybe next time. I already produced a video where I compare the full sharpness profiles of these three lenses (it is coming out on April 28). Kind regards!
Two comments on method: First, you didn't tell us if all 3 were new out of the box or if some were used more than others (possible scratches to the front element here but not there?) and even if all new out of the box, are they the same batch? Or one was stored in a room at temperatures between 20 and 40 for a year and others not? You see what I mean? Two: Get others to try and reproduce the experiment so you can run proper gage R&R and let's see the full MSA...
Hi Nassim! Great points, thank you. I do not know the history of these lenses other than that they are all used and well taken care of. The glass elements did not have scratches or dust. The lens that performed the worst had most signs of wear but still looked very good. I have already produced another video where I compare the sharpness profiles of these three lenses. I will release this video on April 28. Kind regards!
@@tom_photo super that's helpful to know. So the hypothesis then is that the performance of a lens degrades over time... The paired t-test perhaps? Glad I found your channel. Cheers.
@@nassimabed Hi Nassim! Performance may decrease over time but with this small n and unknown history of lenses I cannot state that. You are right that more advanced tests could shed more light on the differences of the lenses. Kind regards!
@@ashgiles4401 Hi Ash! This is a good question. I don't know that, but I think it would be possible to get a rough estimate based on the serial numbers. However, one of these lenses I no longer have. Kind regards!
Your content is always interesting and sublimely well produced. Everything from the images,editing,slides with information and especially your voice and style. I have watched many and more than 10 times each.Thanks for your outstanding contributions which are very helpful to the millions of photo enthusiasts around the world who are using budget cameras and lenses.For people like me who live is Brazil cameras etc are very expensive. My used Nikon D3300 was more than a months salary.Thanks also for showing us that great photos can be taken with the lenses and cameras that you review and test.
Hi david777ism! Thank you so much, indeed, for your kind words, this means very much to me. Best of luck to you!
Thank you for doing this test, and more for the structure and to-the-point nature of the video I'm going to take a look at the rest of your videos since in my eyes you deserve the support.
Hi Georgi! Thank you so much. I appreciate it very much, indeed. Kind regards!
hi Tom, That really caught my interest as 1) I own Nikkor 50mm 1.8 G 2) have other lenses known for big variation in quality e.g. Fuji 18-55 kit - and was wondering about objective sharpness of my copies. I run your basic script using cv2.Laplacian and it returns values from 100-2000 though. For this specific 50mm test, do you normalized the output somehow to 0-100?
Hi Andy! Thanks for asking. If you do not want absolute values (you are not directly comparing two lenses but would rather want to compare the shapes of their sharpness graphs) then you can divide all values of the series by the max value. This way you'll bring all values between 0 and 1. Kind regards!
Amazing job, thank you!
Hi kermitage! Thank you very much indeed. Kind regards!
It would have been great to see comparisons of the pictures, even pixel peeping, to see if the measured change in sharpness results in perceptibly worse photos. I can understand a quantifiable experiment, but determining how it affects your ability to capture would be much more valuable than the raw calculated sharpness values.
Hi Kyle! Thank you for making this valid point. I did not see any visual differences between the lenses, so I did not show the photos. However I fully get your point. Maybe next time. I already produced a video where I compare the full sharpness profiles of these three lenses (it is coming out on April 28). Kind regards!
Two comments on method: First, you didn't tell us if all 3 were new out of the box or if some were used more than others (possible scratches to the front element here but not there?) and even if all new out of the box, are they the same batch? Or one was stored in a room at temperatures between 20 and 40 for a year and others not? You see what I mean? Two: Get others to try and reproduce the experiment so you can run proper gage R&R and let's see the full MSA...
Hi Nassim! Great points, thank you. I do not know the history of these lenses other than that they are
all used and well taken care of. The glass elements did not have scratches or dust. The lens that performed the worst had most signs of wear but still looked very good. I have already produced another video where I compare the sharpness profiles of these three lenses. I will release this video on April 28. Kind regards!
@@tom_photo super that's helpful to know. So the hypothesis then is that the performance of a lens degrades over time... The paired t-test perhaps? Glad I found your channel. Cheers.
@@tom_photo I just subscribed.
@@nassimabed Hi Nassim! Performance may decrease over time but with this small n and unknown history of lenses I cannot state that. You are right that more advanced tests could shed more light on the differences of the lenses. Kind regards!
@@nassimabed Thanks so much for subscribing, I appreciate it!
What are the lens models?
Hi Ash! Thank you for your question. The lenses are Nikon AF-S Nikkor 50mm f/1.8G (if I understood your question correctly). Kind regards!
Yes, thankyou. I get it. They are all the same. Sorry, I didn't listen carefully.
Do you know the date of manufacture for each?
@@ashgiles4401 Hi Ash! This is a good question. I don't know that, but I think it would be possible to get a rough estimate based on the serial numbers. However, one of these lenses I no longer have. Kind regards!