All posts by Mike Goldstein

Photo assignment for the April 3 meeting

Our photo assignment for April 2014 is experimentation with white balance. Often photographers will set the white balance on their camera to match the color temperature of their surroundings; this enables the photographer to capture accurate color in the scene. However, just because your white balance is correct, doesn’t mean it’s “right”.  White balance can be manipulated, in camera or in post, to give the image an entirely different look.

For example, this photo has the white point set to 5500K

5500K

 

and this version is at 4900K for a warmer look

4900K bird

Members are asked to bring in warm and cool images (maximum of 3) and we hope to have a discussion on the effect white balance plays in a photo.

For more information on white balance, check out the tutorial Cambridge in Color.

 

 

 

 

How to do macro photography on a budget

At the April 3rd meeting of Cayuga Nature Photographers, Mark Malkin will show us how to do macro photography without a macro lens.  Spring brings a blossoming of macro subjects, but macro lenses can also bring a relatively large price tag.  So, Mark’s demonstration will focus on the use of close-up filters, extension tubes, and reversal rings as inexpensive ways to get into macro photography.  Bring your camera and tripod so you can try out some new toys and techniques!  We have Nikon gear lined up, and we are looking for Canon gear.  Spring is a great time to explore macro subjects. This will be a great way to prepare for spring. We will meet in room 404 of the  Cornell Plant Sciences Building at 7:30 pm. All levels of photo skill are welcome.Bee on flower

A “micro meeting” at Taughannock Falls

by Paul Schmitt

With apologies to those members unable to just pick up on a weekday and traipse off for some photography, I’m  reporting on what Mike Goldstein has labled a CNP “micro meeting”.  Four of us who were without work obligations ran up to Taughannock Falls this Wednesday for some cold weather photography.  It was such fun that we are hoping to offer such “micro meetings” on weekends in January.
So, the gang of four were Mike Goldstein, David Dunneau, Ray Hunt and myself.  We met at 8:30 am at the parking area at the foot of the gorge and immediately headed for the falls while the wind was calm and the light promising.
One of the cool discoveries was a nice reflection on the open water just above the bridge.  I got this photo.

High ISO and Noise Reduction

by Paul Schmitt

The digital photography has opened a new era in low light photography.NR fig 1 bunny  In the film era, high ISO speeds meant grainy images. Not so now! Mike Goldstein and Paul Schmitt addressed the subject at our December meeting, first showing the increased noise in a scene as the ISO rose, and then using Lightroom to remove noise. Discussion re- vealed that many are unfamiliar with this and miss the opportunity to boost ISO enough to gain fast shutter speeds in low light. This is key to good subject sharpness. So, we will revisit this. The image at right has a wide range of tones from dead black to soft whites. Image noise is analogous to the static heard on a radio when the signal is weak. Dark tones have a weaker “photon signal” and are noisier.

Let’s look at the image noise in a small portion of this scene as the ISO steps up in a Nikon D300S camera. From left to right they are ISO200, 800, 1600 and 6400. (206×308 pixel samples).

NR fig 2 4 image detailNoise first becomes slightly apparent at ISO400, with it clearly growing in severity at ISO800.  (Let’s use the highest ISO6400 so that the result is most apparent in the  limited resolution of the present format.) Continue reading High ISO and Noise Reduction