Technical Question (Page 2): Nice explanation, CO!!

rambler Loc: Masssachusetts

Nice explanation, CO!!

jerryc41 Loc: Catskill Mts of NY

CHG_CANON wrote:

Wouldn't the cause be the angle of the light(s) to the camera lens for the non perfect circles?

That was my first guess. It's like shooting with a fisheye lens. Hold it perfectly level, and you get a near-normal picture. When you tilt it, you get extreme effects.

traderjohn Loc: New York City

cbtsam wrote:

I found myself going to shoot xmas lights with the... (show quote)

I sorta like the pictures.
As far as posting to this site, go to; Create new topic. Then select one of the photography sections. On the bottom you will see choose file then you can download the pictures you want to post. Select store original and you are on your way.
Some people are very anal about where you should post pictures. Some of those more than likely told you not to buy the 850. How glad are you that you didn't pay them no mind??

cochese

Find a review on the lens that tests the lens for coma. Lenstip does a great job at this but not sure if they have tested your lens. Coma is how the lens renders points of light across the field and can cause lights at tthe edges to appear ovoid rather than circular.

Fotomacher Loc: Toronto

Mine is intentional.

Attached file:
(Download)

markngolf Loc: Bridgewater, NJ

cbtsam wrote:

I found myself going to shoot xmas lights with the... (show quote)

Per your comment of how to attach an image. This should help:https://www.uglyhedgehog.com/help/how_to_post_a_picture.jsp
Feel free to PM me.
Mark

billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

cbtsam wrote:

I found myself going to shoot xmas lights with the... (show quote)

They are shaped by the curvature of the glass of your lens.

george19

[quote=Architect1776]Out of focus highlights are nearly ovals or cats eyes as you get closer to the edge. I know of no lens that readily comes to mind that this does not happen with.

First, really good question based on a real example.

Second, I don’t think this is a function of the particular lens (I believe this lens is still capable of focusing at infinity, and except for fisheye lenses, none with purposely designed distortion), but more likely the result from being out of focus.

Love the shot.

SuperflyTNT Loc: Manassas VA

I kinda like the difference in shapes. It gives the shot dimension. It looks almost 3D

Architect1776 Loc: In my mind

JD750 wrote:

Interesting. I took a similar "bokeh" shot with various shaped lights on the tree, and they were all pretty close to round in the image. Nothing like what I see in your shot.

I notice that in your shot the roundness is good in the middle of the frame, but tends to oblong near the right and left edges of the frame. This would seem to me to be due to the optics of the lens.

That is exactly what it is.

cbtsam Loc: Monkton, MD

cedymock wrote:

Was the shot hand held or on a tripod?
If on a tripod was the VR off?

Hand held, VR on.

Fredrick Loc: Former NYC, now San Francisco Bay Area

cbtsam wrote:

I found myself going to shoot xmas lights with the... (show quote)

Almost makes me want to go out and buy a D850. Almost ...

Seriously though, it’s a beautiful image that I would definitely frame!

CO

cochese wrote:

Find a review on the lens that tests the lens for coma. Lenstip does a great job at this but not sure if they have tested your lens. Coma is how the lens renders points of light across the field and can cause lights at tthe edges to appear ovoid rather than circular.

LensTip.com has tested that lens. It has almost zero coma.

cbtsam Loc: Monkton, MD

MoT wrote:

I think you created a wonderful piece of art. Maybe not what you where trying to achieve but nonetheless a piece that should be printed (Pearl type finish if you don't mind the suggestion) and put on the wall.It is a very festive work to me but could be something else for somebody else. Keep experimenting.

Thanks, MoT, for the kind words. Much appreciated.

cbtsam Loc: Monkton, MD

traderjohn wrote:

I sorta like the pictures.
As far as posting to this site, go to; Create new topic. Then select one of the photography sections. On the bottom you will see choose file then you can download the pictures you want to post. Select store original and you are on your way.
Some people are very anal about where you should post pictures. Some of those more than likely told you not to buy the 850. How glad are you that you didn't pay them no mind??

Thanks for the kind words on my images.

I sure thought I had done all of that to upload to this site directly, but it didn't work. Perhaps wrong format? I think I tried it with a .PSB and a .jpg.

I moved up from the 810 to the 850 about 18 months ago, primarily for the "Focus Shift" feature that sort of automates the taking of images for later focus stacking. Bought HeliconFocus, too, and then I just couldn't figure out all the measurements you have to specify in the camera, and what I got didn't come out of Helicon with everything in focus. Frustrated after several failed attempts, I gave up. Then, a few weeks ago I googled it again, and found accounts that, unlike those provided by Nikon and some others , actually gave me a starting point, and I've gotten at least one image that worked as I imagined it should from a stack of something like 9 images. Meanwhile, I like the huge sensor; among other things, it lets me back away from the small flowers I like to shoot, to get enough depth of field, and then I can crop without fear of losing too much quality. So, I guess that's my long-winded way of saying I'm pretty happy with the 850.