No problem.

Adrian

No interests in a trade.
Any takers for a sale, DA40 plus both caps, hood, pouch, box, UV filter plus a Cokin 49mm adaptor ring (no use to me if I manage to sell).

£225 including postage in the UK.

Adrian

If you're down my neck of the woods some time, you're welcome to try out my Tamron 18-250.

Regards
Adrian

I own a DA40 Ltd which unfortunately I never use (the Sigma 18-50 now gives me f2.8 at 40mm). Whilst there is no disputing the IQ it produces, sadly I find primes too restrictive.

As such is there anybody who would be interested in trading a DA 55-300 for the DA40?

SRS currently have these priced at £359 (DA40), and £285 (DA 55-300).

The lens itself is in excellent condition, and has had a UV filter fitted since I have had it.

The DA40 sells for slightly more in the used market, therefore a slight cash adjustment would be required.

If there is any interest please send me a PM.

Regards
Adrian

You can save some money by purchasing the Cokin filter holders and adaptors from e-bay stores. They are not original Cokin, but do the job just as well.

I have the original Cokin wide-angle holder, plus a third party standard holder and rings; both do the same job, with the third party being about half the price.

Adrian

Thanks for all your replies and advice, greatly appreciated.

I imagine that if this were a dust problem then all images would be affected (been there as well); touch wood, as far as I can see at present the sensor seems clean.

What I can now also add is that images taken without the cpl are clean.
I've uploaded three new images to the flickr site, all shot at 18mm but without the cpl (two taken with a Cokin P filter).
link

As John Riley specifies, he never uses a cpl on a ultra wide angle lens; this also applies to my Sigma 10-20, and the results are excellent.
I can sense an experiment approaching, results with/without the cpl.

As I specified originally, the triangle is very small, and it has been suggested that it will be easily removed in PP (not sure how, crop perhaps).

PP seems much more viable than the cost of a slim cpl.

Again looking back on old images taken with the Tamron 18-250, using either a cpl or circular GND, the problem is much worse, some examples within here link

So I think that the conclusion is that the cpl causes slight vignetting at the wider focal lengths.

Again thanks all for your input and help/advice, greatly appreciated.

Regards
Adrian

I've added two more images, taken on the same day as all but one of the others. These were at a focal length greater than 18mm, and the left hand corner is clean (the others were shot at 18mm).

Adrian

I've noticed whilst using a cpl on the Sigma 18-50 (72mm), that on certain shots the top left-hand corner is slightly darker.

Whilst not very extreme, I'm guessing that this is caused by the cpl causing vignetting? I'm using a standard Kenko digital cpl.

If this is the case, would a slimmer filter eliminate the problem?
Or get the cpl for use with my Cokin P holders?

Looking back on older photos, the problem seems worse for those taken with the Tamron 18-250 + cpl.

A few examples using the Sigma can be found here

link

Regards
Adrian

Thanks Peter.
It does seem that if the camera isn't listed then it's a non starter.

Thankfully it's only a trial version (well, it would have been a trial had it worked).

Adrian

I've downloaded a trial of the latest version of DxO, having read that it produces excellent results for nature/landscapes.

However I can't get it to process any of my PEF's, from both old K100D and current Kx files (also won't recognise DNG files). After adding images to a project using the DxO default settings, hovering the mouse over any of the images comes up with the message 'cannot be processed because image has no recognised colour data'.

As it stands I can't get it to do anything.
Is it a case of human error on my behalf?

Any help/advice greatly appreciated.

Regards
Adrian