No need to get depressed. A few years is a long time and things might be very different then.

Do you want to buy a 28mm f2.8 lens? If not, then it's academic. If a Canon user wants a 21mm is there one?

You also can't compare the low cost Canon range with the professional Pentax range. So comparing their 50mm f1.8 with the Pentax 50mm f1.4 is not really a fair proposition. Compare the f1.4 lens with the appropriate level of Canon and Nikon lenses and you end up at about the same street price, give or take £20.

If you really want to see a strange and expensive lens range, there's always Sony!

I would suspect that these results are very skewed. The idea that out of 5 lenses at best the chance of one of them being faulty was as high as 40% is dreadful.

I can see that with the complexity of modern lenses the chance of a fault must be higher than with a manual focus lens, but even so....

And then we see the Sigma result...

The instruction manual does say that although exposure readings can be made with these lenses there may be an exposure error.

A lenses and later will solve the problem.

If you see the resolution figures for MF lenses you will see a difference. This is beacuse the circle of confusion can be larger as less magnification is needed for a given print size. The objective is to achieve something like 4 lpmm on the print, which is the limit of the eye's resolution at normal viewing distances. This roughly equates to a 16" x 12" print from a 35mm negative. To achieve this quality level IIRC the lens needs 80 lpmm.

It doesn't take much maths to realise that we often fall far short of this as we did not usually use a film capable of this sort of resolution. I used Tri-X (400 ASA) which doesn't even come close.

On digital things can be slightly different, but we now look for a resolution of 300ppi in an image for a print. More than this makes no difference to our eyes.

MF lenses are not inferior, just designed for a different requirement. My feeling is that they are a bit bulky for routine use on digital.

There is a separate thread for discussions - please only post your entries here.

I've lost track of how many new pentax lenses I have bought - many dozens for sure. I have never had a faulty one.

From the cover of the new issue of AP - "Perfect Exposure - Create sublime histograms for snowy scenes...."

Maybe it's just my odd sense of humour, but I thought we were trying to create sublime images. Apparently we now have an objective to create sublime histograms instead.

I can see it now, the Camera Club Annual Competition theme - Histogram of the Year.....

2 posts removed. Please start new threads if you have items for sale, rather than hijacking existing ones!

Use of a lens good with complex zoom lenses is vital for the best results.

That's an odd survey, but at least they admit that the results are highly doubtful.