Yes, more nerdy stuff. Please, if possible, can you make a video about why some lenses seem less sharp on crop sensor than on full frame when wide open?
Yes, I am one of the nerds who look for this kind of content. I understand aspects of photography now with my own formulas, so I like to listen to someone talking about the internal functioning of cameras.
Again, loving your content. I seem to learn something new in just about every video you have put out so far. One of your previous videos on how to use flash was SOOO helpful to me because I too have never used flash. I mainly shoot landscapes and nature, but would like to take portraits of my grandkids and family and know lighting, especially indoors, is a big factor in successfully achieving great portraits.
Great video, really like these videos on topics that most people don't really cover (and that I've always wondered about). As an engineer who's studied optics before, I just want to make a few hopefully constructive comments: -Your conclusion that more elements = less sharpness makes sense, but I don't believe this is due to more refraction. Refraction is just the phenomenon of light bending when it enters a slower or faster electromagnetic medium (a result of conservation of momentum). Lens designers use this to design a path for light to travel on to the sensor. I think the "problem" with "more refraction" is actually the exacerbation (due to the greater number of elements) of other nonidealities that cause deviations from this designed light path, such as dispersion (the rainbow effect you showed), reflections, lens defects, finite lens size, etc. -I really like how you listed out the advantages of aspherical lenses. However, one of the ones you mentioned I feel doesn't make too much sense to me. Even if a single aspherical element could replace several spherical lens elements, I don't think that would make the lens overall easier to produce. To my knowledge, the reason aspherical elements are expensive is because manufacturing processes are dominated by rotational motors, which can produce spherical things almost trivially (think trying to drill a circular hole vs. an oval one). So I'd guess it'd be much easier to produce several spherical lens elements than it would to make a single aspherical element. I'm open to discussion, though. I could be totally wrong!
Maybe an off-topic question. Why doesn't there exist any lenses that are 24-105mm range, with an f2.8? And, YES more nerdy stuff. And... love the slow-mo hero walk at the closing credits.
Hi Micheal .... I live far in the northern hemisphere where we have long dark winters... Im looking for a lens for my Nikon ...that will enable me to capture outdoor sports shots ...in the given low light ... PS: (distance wise Im pretty close up to the subject ...so don't need a compensating zoom function ) would you have any tips /recommendations on a quality suitable lens ... Kind Regards
very informative. keep doing nerdy videos but try to add the pragmatic side too. ergo if you buy this type of elements it will be better for this type of photography.
I understand this an old Video, and I have search high and low, finding very little to nothing that properly explains Aspherical Lens and really nothing that shows the difference or Aspherical Lens as opposed to Non-Aspherical Lens. I keep finding eye surgery related videos, not helping. I recently purchased a used NX 500 and the pictures are looking really good, I would like to purchase other lenses for it, I have always liked Photography and still learning. thanks for geeky nerd stuff.
its odd to talk about refraction problems when refraction is what makes a lens work, you don't run into refraction problems just by going from air to glass to air, you run into problems if the shape of the glass is not optimized
Optical engineer and lens designer here. You said “Prime lenses are sharper because they have fewer lens elements”. This is dead wrong! Primes have fewer elements because they don’t need to zoom. Zooms are less sharp because they have to change focal length, and that makes it much harder to correct aberrations to give a sharp image at each zoom position. Adding elements to a given design makes it sharper, but more expensive. You lose a little light at each surface but that does not affect sharpness, only brightness and maybe ghosts/flare.
Yes, more nerdy stuff. Please, if possible, can you make a video about why some lenses seem less sharp on crop sensor than on full frame when wide open?
Just confirmation for you Michael that I love all these 'nerdy' presentations. Please keep producing them.
YES, "nerdy" videos are helpful background, thank you.
Yes, I am one of the nerds who look for this kind of content.
I understand aspects of photography now with my own formulas, so I like to listen to someone talking about the internal functioning of cameras.
Again, loving your content. I seem to learn something new in just about every video you have put out so far. One of your previous videos on how to use flash was SOOO helpful to me because I too have never used flash. I mainly shoot landscapes and nature, but would like to take portraits of my grandkids and family and know lighting, especially indoors, is a big factor in successfully achieving great portraits.
Great video, really like these videos on topics that most people don't really cover (and that I've always wondered about).
As an engineer who's studied optics before, I just want to make a few hopefully constructive comments:
-Your conclusion that more elements = less sharpness makes sense, but I don't believe this is due to more refraction. Refraction is just the phenomenon of light bending when it enters a slower or faster electromagnetic medium (a result of conservation of momentum). Lens designers use this to design a path for light to travel on to the sensor. I think the "problem" with "more refraction" is actually the exacerbation (due to the greater number of elements) of other nonidealities that cause deviations from this designed light path, such as dispersion (the rainbow effect you showed), reflections, lens defects, finite lens size, etc.
-I really like how you listed out the advantages of aspherical lenses. However, one of the ones you mentioned I feel doesn't make too much sense to me. Even if a single aspherical element could replace several spherical lens elements, I don't think that would make the lens overall easier to produce. To my knowledge, the reason aspherical elements are expensive is because manufacturing processes are dominated by rotational motors, which can produce spherical things almost trivially (think trying to drill a circular hole vs. an oval one). So I'd guess it'd be much easier to produce several spherical lens elements than it would to make a single aspherical element.
I'm open to discussion, though. I could be totally wrong!
This is the best photography TH-cam channel 📸
Love this content! Definitely more technical but I'm ok with that. It gives meaning to the technical specs we see everyday on product advertisement.
Thank you! I was just left a voicemail about if I wanted aspheric or non-aspheric lenses! 😫 was so confused but now I have clarity !
Good! Short videos that every photographer like!
Continue with this!
Greetings from Uruguay
Michael.... nice to meet you! You earned my subscription! The perfect video. I like knowing exactly what something is! Thank you ! )))
Love the technical explanations. Thanks for your work.
Good explanation! Thanks.
I really appreciate your video Micheael, greetings from Tuscany!
Many thanks for a great lesson. Great for all knowledge levels. Keep up to fab work mate.
I love the nerdy stuff! Keep it up!
Very helpful. Thank You
Thanks Big time that one helped a lot 👍👍👍.
Very informative. Thanks.
Maybe an off-topic question. Why doesn't there exist any lenses that are 24-105mm range, with an f2.8? And, YES more nerdy stuff. And... love the slow-mo hero walk at the closing credits.
Excellent. Always so good and helpful.
Thanks! This video was very helpful!
Hi Micheal .... I live far in the northern hemisphere where we have long dark winters... Im looking for a lens for my Nikon ...that will enable me to capture outdoor sports shots ...in the given low light ... PS: (distance wise Im pretty close up to the subject ...so don't need a compensating zoom function ) would you have any tips /recommendations on a quality suitable lens ... Kind Regards
This explanation was absolutely perfect!!!!!!!
Great Video Michael, totally up for more content like this.
Thanks dude
Thanks bro.
How aspherical lenses help in prescription glasses and whta are double aspherical lenses, which sell at a premium price, please?
fantastic, MTM, keep on keeping on
That was awesome, thanks.
Petapixel brought me here. I knew some of the info but learned a few new things. Subbed and thumbs up!
Is there any reason they use spherical lens elements still if asph ones have fewer distortion and sharpness problems?
Excellent video...
very useful video
Great video! Please more technical stuff!
Very good explanation. I have one question that, the "Aspherical lens" always capture a flat image or like a fish-eye lens image?
And they are usually made of plastic, which is why it is easy to scratch them when repairing lenses like I just did!!
very informative. keep doing nerdy videos but try to add the pragmatic side too. ergo if you buy this type of elements it will be better for this type of photography.
I am using aspheric lense camera device,
wow that's great video
I like these tech videos so much :D
Enjoyed it!!
wow, cool! I'm still confused to how they can produce this kind of stuff
awesome video.
The more nerdy, the better 💪
Does aspherical lenses cause distortion such as a fisheye effect, or does it improve the quality of a photo?
So aspherical is good?
I understand this an old Video, and I have search high and low, finding very little to nothing that properly explains Aspherical Lens and really nothing that shows the difference or Aspherical Lens as opposed to Non-Aspherical Lens. I keep finding eye surgery related videos, not helping.
I recently purchased a used NX 500 and the pictures are looking really good, I would like to purchase other lenses for it, I have always liked Photography and still learning. thanks for geeky nerd stuff.
And what is floating lens element
its odd to talk about refraction problems when refraction is what makes a lens work, you don't run into refraction problems just by going from air to glass to air, you run into problems if the shape of the glass is not optimized
Horizontal astigmatism picture looks vertical astigmatism to me!!!!! Anybody else
Optical engineer and lens designer here. You said “Prime lenses are sharper because they have fewer lens elements”. This is dead wrong! Primes have fewer elements because they don’t need to zoom. Zooms are less sharp because they have to change focal length, and that makes it much harder to correct aberrations to give a sharp image at each zoom position.
Adding elements to a given design makes it sharper, but more expensive. You lose a little light at each surface but that does not affect sharpness, only brightness and maybe ghosts/flare.
Interesting
So if I wanted more bokeh, I would use a spherical lens?
It doesn't really help.