Show HN: Lens Battle – Make comparing lenses easier (with leaflet.js) | Hacker News Reader

Show HN: Lens Battle – Make comparing lenses easier (with leaflet.js)

polarr.co

17 pointsbwang2911 comments

OP here: some of the misalignments are caused by distortions and slight camera movement. Those are the hardest to control and require repeated try. The Sigma lens is also overly heavy that pointed the camera down-ward a little. Will try to do better in the next round of lenses.

Pretty good start i'd say. Nice to see leaflet.js getting used outside of maps. A couple comments: 1. the choice of the subjects is questionable. Couldn't you have chosen a better scene? Perhaps a landscape/portrait where extra detail can be more easily compared between the photos. Let's be honest, who's ever gonna take a photo with these lenses on a doll. For crying out loud, get some models and I guarantee this will take off! 2. would like to see more lenses to be added, along with different zoom settings

I'm no lens expert but I'd imagine that the differences in lighting and motion in landscapes and portraiture between takes might obscure the subtle differences between the lenses themselves. The static subjects probably give a more fair comparison.

Difference lenses have very different MTF (resolution vs how far away to the center of the lens) in theory and because of the different lens internal structure, they also have different fringing, distortion performances as well. The bokeh look different depending on the shape and the number of aperture blades. Sometimes it is not clear whether spending 2x or more is worth it so this is I believe very helpful to help buyers to see what's the actual differences of lenses are without all those fancy ads.

that's a fair statement, i just felt the subjects could be improved. Seriously, no one uses these lenses for shooting baby dolls. Something that's a bit more relevant, or pleasing to the eyes would be much better subjects. I'm sure these guys can spare a couple hundred bucks and hire a professional model to do some shooting ;)

That's very, very nice! Thank you!

I noticed that on the most expensive lens, in the "car" scene, the focus seems to be very different than with other lenses. Which makes the comparison difficult. Your DLSR most likely records autofocus points: it might be a good idea to actually display them in the JPEGs, because at such high apertures you really want to look at what's in focus.

OP here, we sort of screw up on that one.

Should have done at least two groups of auto focusing and manual focusing.

The car scene was done in a a little rush because the sun is moving. Not sure what's going on with the sigma but we made sure the camera beeps when it reports in focus at the medal Jaguar logo.

If people like this idea, we will get more lenses in the next series and add Canon and other brands if possible.

Right now the original JPEG is around 14MP and very slow to load, so we had to slide them into tiles thus using leaflet.js.

When you switch photos I might pull all the way back out. It looks like you stay focused in.

Meaning whatever I was focused into on the picture I was just on is not important to the new picture. So pull back out. Ha hopefully that made sense.

Super cool idea.

Want to see more comparison between lenses for Canon.

The Digital Picture does a fantastic job with center, corner and mid-frame crops: http://www.the-digital-picture.com/Reviews/ISO-12233-Sample-...

Highly recommended, their reviews are also fantastic.

Great resources. These are almost always qualitatively correct but it's hard to see the lens performances in real settings (out of paper) and to get an overall holistic view of the differences in "looks" . Both approaches have their merits.

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