How far digital cameras have advanced in 9 years.

My first digital camera was the Canon D30 from 2001, a DSLR with a 3 Mega Pixel APS-C sensor, I just found this comparison with 100ISO film, and it wins! No wonder I didn’t shoot a roll of film after buying it! My latest camera is the 21MP full frame 5D mk2, I regularly print A2 images which look sharp even when viewing from inches away. It’s hard to imagine how far we have come in 9 years of digital camera technology, looking at my film prints from several years BD (Before digital) they look soft and grainy. (if you like that effect, it is easy to replicate using Photoshop and/or plugins like Nik Silver Effects Pro).

Imagine if cars had advanced so much in that time!

It is interesting that when scanning a 35mm slide, it is possible to obtain a simply huge file, – bigger even that a 21mp digital file, but the file size is so big because of the intricate detail of the film grain. This larger file contains no actual extra useful resolution, which is why the D30 managed to deliver such an an unexpected result in 2001.

Canon EOS D30 compared to Film

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Black & White Photography Magazine test of Zeiss prime lenses

The May 2010 edition of B&W Photography has the following Zeis lenses on test by Lee Frost.

21mm f2.8 Distagon, 28mm f2.0 Distagon, 50mm f2.0 Makkro Planar, 85mm  f1.4 Planar

Frankly it is a pretty lightweight article with no printed comparisons, but it does come to similar conclusions to my article and testing. The 21mm is the pick of the bunch as it is a unique lens, incredibly sharp and comfortably outperforms the Canon 17-40 f4.0. The 50mm Macro lens is useful, sharp and excceds the quality of the Canon L24-70 f2.8 zoom. (No comparison is made with a Canon 50mm lens). The 28mm f2.0 did not outperform the Canon 24-70L and the 85mm similarly was not noticably sharper than the Canon 70-200 f4L.

No testing or mention was made of focus shift issues with the 85mm lens, where the plane of focus moves away from the camera as the lens is stopped down from f1.4 to around f2.8, making precise focussing almost impossible unless using depth of field preview and live view simultaneously, which is not  too convenient for a portrait lens!
I have uploaded many examples taken with the Zeiss 21mm f2.8  to the Flickr Zeiss Distagon Group.

Zeiss 21mm examples on Flickr

Zeiss 21mm

High Dynamic Range Software

3 exposures, that were blended for the results below.

Digital cameras have a come a long way in the past ten years, and now a RAW file from a full frame camera can have a 12 stop exposure range. (Though it is in reality actually rather more difficult to extract the full range). There are many situations when this will not be enough, resulting in blown highlights and shadows dominated by noise. Combining several exposures in post processing will recover the highlight and shadow detail. In the early days of digital, this was little more than making an exposure for the sky, and another for the ground and merging them in Photoshop – often with mixed results.  The launch of HDR software like Photomatix and the features progressively added to Photoshop have made this somewhat easier – no need for masks or manual blending.  However, HDR has received bad press due to the unreal results that can be obtained with it.

Recently I have been carrying out an extensive test of Photomatix against various competitors that use the “Enfuse” open source algorithms to fuse multi-exposure images to give a more natural look than the classic “HDR”. This is partly due to frustration when using the Photomatix Lightroom plugin or standalone application at the difficulty of obtaining a natural image. I’m very impressed with the ease of use and the results from some of the Enfuse based systems. And the process of Enfusing also reduces noise – Tone mapping increases it. There is much less control than Photomatix, but as you will see, this seems to be an advantage in terms of the quality of output.

Before I start I should state that my interest here is to obtain a natural exposure – as close as possible to the original optimum exposure – but with the highlight and shadow detail from the lighter and darker exposures “added in” in a way that looks completely realistic. This would be like having a 24 stop exposure range on the camera. I am not interested in using “tone mapping” for creative effect.

READ MORE….

Zeiss 21mm with Lee filter system vignetting problem

I recently bought a Lee filter system with grads and the universal hood and polariser. While the Hood and grads work well with the Zeiss, unfortunately the 105mm polariser, that screws into the front of the hood, causes hard vignetting – it is not just a gentle darkening. See picture. I am investigating a slimmer filter to see if this will solve the problem, with Heliopan being top of the list at the moment.

Interesting comparison of Polarising filters

http://www.lenstip.com/115.4-article-Polarizing_filters_test_Results_and_summary.html

I have Marumi and Hoya Pro 1 – I find the Hoya’s very difficult to clean without scratching them, so I wouldn’t recommend them. I am after a slim 105mm for my Lee Filter system, as the Lee Polariser is too deep and causes vignetting with my Zeiss 21mm and even the Canon 24 -105mm

Unfortunately B+W don’t make a slim mount 105mm polariser but Heliopan do.