Tilt/shift

by Alex Brown 1. August 2012 11:14

When photographing big things, whether natural or man-made, one basic photographic problem is getting the subject into the frame so it at least looks reasonable. Here is St Marys and St Nicholas Church in Beaumaris taken with a 24mm lens.

The problem (1)

Standing in front of it, with the camera completely level, it’s only possible to get a partial shot: the lower portions of the church. More...

Going under the knife

by Alex Brown 9. December 2011 06:00
Alex3
Alex3 by FreddieBrown

And so, unexpectedly swiftly, I find I am to present myself at Addenbrooke's at 07:00 this Saturday to be admitted for an open partial nephtectomy (following the recent diagnosis of suspected kidney cancer).

Laparoscopic vs open surgery

I have avoided hospital all my life so far, so the sudden prospect of major surgery is a little daunting. I discussed various surgical options with my consultant – I was attracted by the idea of laparoscopic surgery, but perhaps only because my inner geek was interested in having a robot involved in the procedure (the hospital has a da Vinci Surgical System). The chief advantage of the laparoscopic approach is that it is less invasive and therefore tends to have a shorter recovery time – and exhibiting perhaps a dry sense of humour the consultant observed I was probably “keen to get back to the gym”.

However, in my sort of case the Cambridge team tends to favour open surgery. This is in part because they can dump ice into my body cavity during the operation, so that the (cooled) kidney remainder dies a little less as a result of the necessary ischemia, but also because of the “endophytic cyst” that has been found in the centre of the kidney. Ah yes, that cyst. The doctors seems sure this is nothing to worry about, since many people develop simple (fluid-filled) renal cysts at some time. However just to be sure the surgical team will perform an ultrasound scan on my exposed kidney to confirm whether this cyst really is as simple as it appears, and if not – cut it out. Given that I am learning that doctors are practised in the art of gradual disclosure, I feel a little nervous about this.

Radical vs partial

There was also the question of whether to have the whole kidney removed (radical nephrectomy), or just the diseased part. The thinking here is that for smaller tumours (such as mine) it is better to preserve some kidney, and so some kidney function, where possible. This is not so much based on direct clinical evidence – since one kidney always takes-over so over effectively when the other is removed this would be hard to measure – but on logic: if something else goes wrong with the remaining kidney later, it is surely better to have preserved whatever one can.

Retail therapy

Faced with various discomforts ahead, I decided I needed to treat myself to some compensatory camera equipment, and plumped for a second-hand Nikon D700. This is a camera that Nikon is about to discontinue, but has many points in its favour:

  • It’s now been around long enough (since 2008) that second-hand ones are available at reasonable prices.
  • It’s a “full-frame” camera, with all the attendant benefits that brings – particularly in ultra-wide lens choice, which intereste me.
  • Unlike some Nikon models this has happy colours.
  • It’s so well-established that supporting software (such as my favourite RAW converter, DxO Optics Pro) is thoroughly de-snagged.

I’ll post some more thoughts on this camera when I’ve had a chance to use it more, but in the meantime … Merry Xmas!

Xmas Cheer

Nikon Colour Character

by Alex Brown 9. April 2010 18:25
On Cromer Pier
Classic Nikon D300 territory: soft light, cool palette

On a recent trip to Norfolk, I forgot to take a camera battery charger and so after my trusty Nikon D300 ran down I was forced to resort to my vintage (well, 2005) Nikon D50 as backup.

Now, I’ve had the D300 for over a year and still feel I’m coming to terms with it. It’s somehow a serious camera and it turns out serious‑looking images; in particular, when it comes to colour it’s at its best with cooler, softer, almost pastel‑like scenes – which it renders with a painterly subtlety. When it comes to attempting warmth, it seems to me to to veer off course and crash into a citrus palette. As I've written before, it’s possible to do something about this. Yet somehow the original character of the sensor seems to come through.

The D50, in contrast, seems to produce punchier, vidid (and not‑so‑serious images). What you see below is straight out of the camera converted from RAW to JPEG using DxO Optics Pro and DxO user Andy_F’s default settings (check out the forums to find Andy’s excellent work on better colour accuracy from RAW conversions). And so if I’m not imagining all this, in some ways (whisper it) I might even prefer the look I can get from the earlier camera …


Colman's Mustard Traffic
Bam! The Nikon D50 delivering obvious, saturated colours

What Colour are Rose Hips?

by Alex Brown 9. August 2009 11:34

I have been using a Nikon D300 now for six months, and one of the characteristics I have had to get to grips with is its default colour handling: out of the camera the colours can be a touch “zingy” to my eyes – in an effort to replicate the classic Fuji Velvia look, the colours processing gives very rich yellows, but this has the side effect of making reds somewhat orangey.

Here is a picture of some rose hips:

Rose Hips #1

In real life to my eye it seemed that the central rose hip had no orangeyness to its red; the upper rose hip had just a touch of orange. But, out-of-the camera, the colour rendition here differs from what I saw: the tints are much more orange.

One solution to this lies in the dark art of RAW conversion. Many photographers roll their eyes at this business – it can require a lot of time farting around with post processing software rather than taking more photos. However, I quite like farting around with software, so am quite happy to experiment.

For RAW conversion I use the fabulous DxO Optics Pro package. This offers a host of options for converting the RAW image into a JPEG, and it has to be said that some of these (such as chromatic aberration fixing) are now finding their ways into camera bodies. However, this software still offers quite a bit more flexibility and, in particular, will fix lens distortion for certain camera/lens bodies which have been analysed.

Another useful feature is the ability to control colour rendering. Want to give your Nikon D300 pictures the look of a Canon 40D? No problem – just specify it.

For Nikon users, a DxO user by the name of Andy_F has developed some RAW conversion presets specifically targeted at correcting the colour conversion of recent Nikon bodies. The result of using one of these to process the original RAW file give this result:

Rose Hips #2

Which is much closer to what I think I saw.

Even better though is Andy_F’s “landscape” preset, which attempts some detail recovery from the image:

Rose Hips #3

Dew Daisy

by Alex Brown 25. May 2009 19:09
Dew Daisy
Dew Daisy
Originally uploaded by alexbrn

Really enjoying the capabilities of the AF-S DX NIKKOR 35mm f/1.8G. Thoroughly recommended for all Nikon DX shooters.

Tags: , ,

Nikon D300 Woes

by Alex Brown 13. April 2009 14:46
Nikon D300: Dreaded F0 Problem

The problem first surfaced in Prague, and has happened a couple of times since. The display shows F0 (as shown), the lens becomes fully stopped-down and autofocus stops working. Poking around the web, it seems this is a far from uncommon problem with Nikon D300s (see for example here, here, or here).

Now, the fault is intermittent – it generally happens after a good few minutes or hours of shooting and then mysteriously clears several hours later. So, when it last struck I took the above picture. Today I had a chance to lug the D300 into Cambridge to return it to Jessops. Knowing a bit about the Sale of Goods Act I was expecting to get a new unit, or an equivalent loaner while the D300 was repaired. With a family holiday coming up I don’t want to be without a camera!

Sure enough, the fault refused to show itself at the camera shop. So - lucky I took a picture, I say. There’s no verifying serial number on it they say. Jessops insisted they would have to send the camera away to verify for themselves that it was faulty. And no, they weren’t going to replace it; and no, they don’t ever loan replacement cameras. What about my consumer rights? Jessop’s seem to think it is okay to take the unit away for independent testing before those rights come into play, and that a photograph of the fault isn't sufficient evidence: that is company policy. Needless to say, as somebody who has spent large sums of money with Jessop’s over the years, this “no can do” attitude caused distinct irritation, and I made my displeasure felt before taking my £1,000 of new faulty camera away with me, hoping it won't misbehave too badly on holiday.

What next?

Well, to anybody contemplating buying a Nikon D300, I say – be aware of this potential problem.

To anybody contemplating buying photo equipment from Jessop’s I say – cross your fingers it doesn’t develop an intermittent fault that you can’t prove beyond doubt, otherwise you’re going to find yourself, like me, in an unhappy place.

Meanwhile I have contacted Jessops' Customer Liaison; let's see what they say ...

About the author

Alex Brown


Links

Legal

The author's views contained in this weblog are his, and not necessarily of any organisation. Third-party contributions are the responsibility of the contributor.

This weblog’s written content is governed by a Creative Commons Licence.

Creative Commons License     


Bling

Use OpenDNS  

profile for alexbrn at Stack Overflow, Q&A for professional and enthusiast programmers

Quotable

Note that everyone directly involved in the development of ISO standards is a volunteer or funded by outside sponsors. The editors, technical experts, etc., get none of this money. Of course, we must also consider the considerable expense of maintaining offices and executive staff in Geneva. Individual National Bodies are also permitted to sell ISO standards and this money is used to fund their own national standards activities, e.g., pay for offices and executive staff in their capital. But none of this money seems to flow down to the people who makes the standards.

Rob Weir

RecentComments

Comment RSS