Archive for category Arty Notions

Film Test… part I

Posted by Jeanette on Wednesday, 6 January, 2010

After giving up on consumer-level digital photography in low-light fast-action conditions, I went back to shooting basketball in the Shirk Center with my mom’s dad’s old Minolta XRTII manual SLR (no batteries needed!), and shot with a variety of film in order to choose the one I like best. All three of these films were developed by Cooper’s Imaging in CT. The summaries:

FOMAPAN action 400 black/white negative film

  • Picks up detail well, but a little grainy.
  • Needs slower shutter speeds (~250)
  • Dark photos don’t have a lot of contrast
  • Excellent dark/light contrast
  • Out-of-focus shots really pull out the graininess

From the package: B/W negative film with good resolving power, low granularity and wide exposure latitude.

Ilford HP5 Plus 400 Black & White Film

scanner won’t read the photos – too dark. Think the stop-down communication between the lens and the camera body was not accurate. Too many photos too dark. Nonetheless…

  • A very dull and dark negative switched into lab mode and then an auto-levels applied. Wow. Definitely can work with that, but it only works with some negatives.
    Original   Auto Levels   Curves
    009-01 original

    009-01 original

    –>

    009-01 lab mode auto levels

    009-01 lab mode auto levels

    –>
    009-01 curves

    009-01 curves

  • The negative edges curl, which makes it annoying to place in the negative holder for the scanner

Kentmere 400 Black & White Film

BH’s summary:

This is a fast black and white film geared for general use. It produces sharp images with fine grain. As a high speed film, it is suitable for normal and low light photography.

  • Looks nice and bright until enlarged, and then not in focus. Humph. (But that’s my fault, not the films… unless it isn’t fast enough, but it’s bright enough to kick up the shutter speed one notch.)
  • Sometimes bright, but not much contrast, which comes out when they aren’t too bright. BH says it has good contrast, but apparently not in low light conditions.
  • I think this would be great for something other than Shirk photography.
  • Then again, I kinda like it. There is no grain! It is a very sharp and clear film. This contrast puzzle bears a second look
    Icky   Nice
    not much contrast

    Original: not much contrast

    vs.
    better contrast

    Original: better contrast; too bright?

Decision?

By the time I decide, basketball season will be over! Oh well. At least IWU’s celebration of 100 years of men’s basketball is this weekend, and I have approximately seven rolls of film (mostly Ilford).

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Working with LAB space

Posted by Jeanette on Sunday, 6 December, 2009

Since I’m getting back into sports photography, I’ve been playing with photoshop again, this time referencing Photoshop LAB Color: The Canyon Conundrum and Other Adventures in the Most Powerful Colorspace. Best photos to edit in LAB mode are those that are washed out. For example, I edited a photo I entitled “missed — drowned rat” from my time out on Hutchinson Island in Florida spring 09. Unusually, there were massive amounts of kelp in the water; most of the time the water is teal blue, but the waves were mostly green.

The original:

Original as photographed

Original as photographed

The final after editing curves in LAB mode:

Final as edited in LAB mode

Final as edited in LAB mode

Since I enabled the History Log in Photoshop (CS2), I’m adding that as reference here. For a quick recap, after converting to LAB mode, I cancelled out of Image>Adjustments>Threshold to not make any changes, but to determine that darkest and lightest points on the photo. ThenĀ  I increased the slope of the curves in the Lightness channel around my face so as to make it pop out of the shadow, and adjusted both the a and b channels to bring out both the turbulent green waves and the calmer blue troughs. After an Unsharp Mask on the Lightness Channel and a conversion back to RGB, I completed a brightness/contrast adjustment, saved and voila.

2009-12-06 20:53:08 File IMG_2043.jpg opened
Convert Mode
To: Lab color mode
Curves
Curves
Adjustment: curves adjustment list
curves adjustment
Channel: lightness channel
Curve: point list
point: 0, 0
point: 22, 37
point: 39, 70
point: 88, 115
point: 255, 255

curves adjustment
Channel: a channel
Curve: point list
point: 13, 0
point: 238, 255

curves adjustment
Channel: b channel
Curve: point list
point: 14, 0
point: 239, 255

Select lightness channel
Show a channel, b channel
Unsharp Mask
Unsharp Mask
Amount: 206%
Radius: 1.2 pixels
Threshold: 76
RGB Color
Convert Mode
To: RGB color mode
Brightness/Contrast
Brightness/Contrast
Brightness: 10
Contrast: 7
Save
As: JPEG
Quality: 12
Matte: none

Since all my sports photos will be manual and b/w, I’m not sure how extensively I’ll use LAB mode, but it is fun to play with.

Playing in the Lab Lightness Channel

Posted by Jeanette on Friday, 6 June, 2008

About a year ago, maybe less, maybe a bit longer, I purchased a book called Photoshop Lab Color: The Canyon Conundrum and Other Adventures in the Most Powerful Colorspace. Though I’ve played with it, a bit here and there, I haven’t really progressed through the book as much as I might like to, if I had many fewer activities. For me, and my crazy skip-to-skip-around personality, the best thing about the book has been the introduction to the fact that Lab Mode actually exists in Photoshop. I use version CS2, and since I don’t need it professionally, I don’t see the need to upgrade. I’m not sure how the color mode exists in other versions, both since and previous.

When I first started looking at the color space, I quickly became aware that many of the filters were grayed out and unusable in the color space. Today, I found out that if I go to the channels tab, and select the Placed this channel, the filters come back full force. The differences between using a filter on the Lightness channel and Lab Mode and using a filter regularly in RGB Mode are slight. But to my eye, I prefer the Lightness channel. What do you prefer? (You can also apply filters to the a and b channels, but these bring on strong color alterations.)

For today’s post on my second blog, temporarily called Visual Snoopin’, I chose an old photo of some sweet peppers from my garden in 2006. I wanted to spice it up a little bit, so I decided to apply a filter. And then I found that I could use filters in the Lightness channel in Lab Mode.

Below, I’ve posted examples of the difference between using filters on the Lightness channel in Lab Mode (Left) and RGB Mode (Right). You can view my final selection at Visual Snoopin’ if you wish.

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