Category Archives: Photography

Articles about photography, photographic technique, and related subjects.

How to Remove Color Cast

Automatic white balance in your modern camera can handle a lot when it comes to correcting the color of an image, but it has limitations and doesn’t always remove the color cast completely or accurately. I’ve found this especially true when dealing with Cokin neutral density filters as they’re notorious for creating a distinct color cast when stacked on each other. Now, I could splash out for more expensive filters, but if you know how to remove the color cast in the first place, then you can save quite a few bucks!


The trick has a few steps to it, but it really doesn’t take long in Photoshop. Working with a photo I took at the Grand Canyon, I’ll illustrate.


Notice that the image has a distinct blue cast in the top half of the image, less so in the bottom half. So, we want to remove the cast without effecting the image quality and detail.

Step 1: Create a group in the layers pallet and call it “Color Cast.” Select it.

Step 2: Add a blank layer in the group and name it “Highlights.” Select it.

LayersStep 3: Using the foreground color selector or the eyedropper tool, pick an area in the highlights exhibiting the cast.

Highlight SampleStep 4: Fill the highlight layer with the foreground color (Option-Delete).

Step 5: Invert the layer (Command-I).

Step 6: Set the mode of the layer to “Color” and adjust the opacity down to somewhere around 8-15%. Play with it a bit, but it’s a really light touch there and a matter of taste.

Highlight Layer FilledStep 7: Adjust the layer style to apply the correction the highlight areas. Double click on the layer to bring up the blending options and then tweak the “Underlying Layer” sliders in the “Blend If” group. To split the black slider, hold the Option or Alt key and click the triangle. Adjust to something like 25/115 or thereabouts with the two triangles. At this point, you may want to play with the opacity a bit more.

Highlight blending


Next, we’re going to do the shadow portion of the image. Basically, this is a repeat of steps 2 through 7 with some small variations as follows:

Step 8: Add a blank layer in the group and name it “Shadows.” Select it.

Step 9: Set the foreground color to a shadow area with the color cast.

Shadows Sample

Repeat Steps 4 through 6. For the last step, the adjustment is very similar to step 7, but with the highlights, like so:

Shadow blending

Resulting in:

Shadows Adjusted
Shadows Adjusted

Now, a few more tweaks to remove the haze and sharpen it up…


There you have it, color cast adjusted, though there are some addition tweaking that could be done, the sky is a bit “meh” from a detail and look perspective. I’d likely crop that out if I was to print this.

I find that you can also do this a couple of times on the same image, picking different highlight and shadow areas. That’s what I did with the dancer from the Tropicana Club in Havana, a challenging scene given that the lighting colors were very mixed.

Many thanks to Michael Woloszynowicz of Vibrant Shot for his great YouTube videos including the how-to for this technique. While you’re there, check out his fantastic sharpening techniques where he also supplies you the photoshop actions. Worth subscribing to his channel.

Olympus Air A01 – A Barrel of Fun

Olympus Air A01
Air A01 body with the kit lens attached.

The Olympus Air A01 isn’t really a new concept, Sony has a very similar option (with a few more features at a slightly higher price), but both strike me as a very real future for camera portability. The primary reason that I went with the Olympus, despite being a huge fan of Sony made sensors, is the body/lens size is smaller on the Olympus and I was going for more portable. In any event, let me state that this is not a review, just my impressions. If you want reviews, there are a number of them out there already and they’re going to have done a better job at it than I will!

In any event, impressions… So, let me start of with: I really, really, like it. Immediate good things that pop to mind are:

  • Small and light, can coat pocket it pretty readily. Pants pocket would be pushing your luck…
  • Fits the hand well. I don’t have especially large hands, so I appreciate the feel of the camera in my hand, it’s not bulky in feel.
  • Responsive and very controllable auto-focus, you basically touch your phone screen for where you want focus.
  • 10 frames a second shooting.
  • Easy to get into weird places. I’m looking forward to putting this in a tree this summer, because I can control lens zoom and focus remotely.
  • Open SDK for software developers is available. So, don’t like their app? Roll your own.
  • You can use it blind, no connected smartphone is necessary. That can give you a bit of an old-time, how did it turn out, thrill.
  • Micro 4/3 standard sensor and lens mount, opens up a good range of lens options, not just from Olympus. That was also a reason I passed on the Sony.

Some quick short-comings:

  • No flash. This is where the SDK might become useful, being able to trip a flash via some other means, perhaps over the 3.5mm jack, would make a camera like this very handy in the studio.
  • Integrated battery. It’s USB chargeable, so it’s possible to extend using the same portable power packs we often have for smartphones.
  • No Raw+JPEG mirror to the phone. You can mirror if you shoot JPEG only, though image copy to the device after is actually quite quick and easy.

All-in-all, I think the short-comings aren’t really that big of a deal. The image quality is excellent, the camera is responsive, and the creative options seem quite limitless when comparing it to the bulky beast that my D800 is. Mind you, I don’t see me giving up the D800 any time soon, but it’s nice to have a very good, high IQ, camera that I can more readily carry around with me.

My incredibly affectionate Betsy

So, where I can see this sort of camera really getting used?

Well, clearly street shooters would find it really useful, the stealthiness is pretty obvious. One of the challenges of shooting on the streets is reactions to having big cameras pointed at them. With this, you don’t even need to be looking anywhere near where they are!

Product photography under continuous lights. The lack of flash is a challenge, but putting the camera on a tripod, yes it has a tripod mount, and then controlling from a big IOS or Android tablet is pretty nice.

Wildlife stealth shooting, one of my plans, because it’s small and quiet and you can get out of the way while still controlling it. Range of wireless appears to be around 30 feet or so, but that can get you out of the general visible area.

A candle lantern on my back porch

Some quick specs:

  • Micro-SD card slot
  • 10 fps
  • 16MP Micro 4/3 Live MOS sensor
  • Shutter speeds from 4s to 1/16000s
  • Full HD 30fps video
  • Full tripod socket
  • App available for IOS and Android

The Man Behind the Bees has Passed Away

Sadly just learned that Paul C. Buff, the man behind the immensely affordable Alien Bees has passed away. Can’t say that I knew him personally, but what I can say is that Buff brought studio lights to us beginner and amateur photographers in a way that no other had done. If it wasn’t for his lights, I wouldn’t have ventured into the more interesting realms of lighting and, for that, I will be forever grateful.