You will likely get some strange effects applying a polarising filter to a lens with such a wide field of view. I am thinking especially at the short end.
I seem to recall this being discussed on the forum before, but I cannot find the thread.

The link below goes someway towards explaining the issues.

http://www.kenrockwell.com/tech/filters.htm

Regards - Steve

Lots of interest, but still for sale.

I am open to offers, if not sold this week I will auction on eBay.

Steve

Gareth, thanks for your comments. I will look at a different crop for number 2. As for number 6, the mast reflections are cut off by a scrappy sure line so I don't think a portrait shot would work.

Regards - Steve

Taken on a trip to Ullswater last week

1.
[IMG]http://i198.photobucket.com/albums/aa184/stevejcoe/Ullswater/_IGP4318-11web.jpg[/IMG]

2.
[IMG]http://i198.photobucket.com/albums/aa184/stevejcoe/Ullswater/_IGP4095-2web.jpg[/IMG]

3.
[IMG]http://i198.photobucket.com/albums/aa184/stevejcoe/Ullswater/_IGP4086-1web.jpg[/IMG]

4.
[IMG]http://i198.photobucket.com/albums/aa184/stevejcoe/Ullswater/_IGP4151-3web.jpg[/IMG]

5.
[IMG]http://i198.photobucket.com/albums/aa184/stevejcoe/Ullswater/_IGP4260-6web.jpg[/IMG]

6.
[IMG]http://i198.photobucket.com/albums/aa184/stevejcoe/Ullswater/_IGP4272-1web.jpg[/IMG]

Couple of shots taken with the convertor + Pentax 50mm F1.7. Shots were taken hand held at F8

[IMG]http://i198.photobucket.com/albums/aa184/stevejcoe/Equipment/vivmacro3.jpg[/IMG]

[IMG]http://i198.photobucket.com/albums/aa184/stevejcoe/Equipment/vivmacro1.jpg[/IMG]

Cropped plus minimal sharpening applied with Silkypix during development

Stefan, I agree with John and Al, I would also refer you to Piotr Haskiewicz's portfolio (Forum username Hasky), who has produced some magical portrait images with the FA 77Ltd.


Regards - Steve

Good luck with your ebay purchase, I will keep this item for sale on this forum for a week or so, before listing on ebay

Regards - Steve

I am having a clearout, so this convertor has to go. The convertor uses a combination of optics (a multi-coated 7-element configuration), plus an extension tube which when fully extended doubles the focal length of any lens attached to it.

Using a 50mm lens results in a maximum of 1:1 magnification at a minimum distance of 45cm. The effective aperture will then be double the set aperture number. For example, f/1.4 becomes f/2.8, or a 2 stop loss in light.

The convertor is PK mount so it needs to be used in manual mode and is in pretty good condition for its age, with just a few specs of dust, that do not significantly effect IQ. It comes complete with caps and its original lens case (a bit tatty)



[IMG]http://i198.photobucket.com/albums/aa184/stevejcoe/Equipment/Vivconvertor1.jpg[/IMG]

[IMG]http://i198.photobucket.com/albums/aa184/stevejcoe/Equipment/Vivconvertor2.jpg[/IMG]

[IMG]http://i198.photobucket.com/albums/aa184/stevejcoe/Equipment/Vivconvertor3.jpg[/IMG]

This convertor was very well regarded in its day and represents a cheap entry into 'Macro' photography. See link http://www.jr-worldwi.de/photo/index.html?macro3_shootout.html

I am be looking for £50 plus postage (say £4.50 for 1st class signed for delivery.

Here are a few images captured yesterday at Foxton Locks on the Leicestershire arm of the Grand Union Canal.
There are 10 locks in total made up of 2 staircases each made up of 5 locks.

Well worth a visit

[IMG]http://i198.photobucket.com/albums/aa184/stevejcoe/Foxton%20Locks/Goingdown_a.jpg[/IMG]

[IMG]http://i198.photobucket.com/albums/aa184/stevejcoe/Foxton%20Locks/Goingup_a.jpg[/IMG]

[IMG]http://i198.photobucket.com/albums/aa184/stevejcoe/Foxton%20Locks/Rushhour_a-1.jpg[/IMG]

[IMG]http://i198.photobucket.com/albums/aa184/stevejcoe/Foxton%20Locks/Headwear_a.jpg[/IMG]

[IMG]http://i198.photobucket.com/albums/aa184/stevejcoe/Foxton%20Locks/Idyllic.jpg[/IMG]

Hi Steve, I have experienced similar problems with older Pentax lenses (I have no Sigma lenses) As with your case they communicated with an older camera in my case a Z1, but not with an MZ6 or K10.

In my case it was contacts inside the lenses that needed cleaning and adjusting.

Regards - Steve