I have the Cosina 3.5 100mm as well under the Phoenix brand.
Bought it off Ebay as autofocus and when I received it the lens was manual.
Too expensive to return it as it was from the USA but its actually not that bad for the money.

This was a quick shot taken with it, only time it has been used.

I would def go for the 100mm version of whichever macro lens you decide on as if you are doing insects you need that extra reach.
I would say either the Pentax, Tamron 90mm or Sigma 105mm will all do you just as well tbh.
I use both a Tamron 90mm and an old Vivitar 100mm manual focus lens and prefer the Vivitar for quality but the Tamron for portability.
The Vivitar is made completely of metal and is just so ruddy heavy.

Yes, just been reading about it.

It is also possible to use this lens with Sigma 1.4x EX and 2x EX APO Tele-Converter. 1.4x APO EX tele-converter (optional) allows the photographer to use this lens as a 210mm F4 AF tele-macro lens while maintaining auto focus function from 0.52m to infinity. At distances closer than 0.52m the lens automatically switches to MF mode. When used with the 2x EX tele-converter, the 150mm F2.8 EX DG HSM lens becomes a 300mm F5.6 MF tele-macro lens with manual focus function only.

I somehow doubt they are going to make it a rush job just for me .. although personally I cannot see why.

Well I have to say I am impressed,
Emailed SIgma UK straight after posting the previous message and just got a reply.

Dear Sir

There are plans to produce this lens but Japan have not yet decided when they will start to produce them.

Kind Regards


I may well wait a few months and see what happens.
A 150mm F2/8 macro would be rather nice for around £350 .. with the money saved I could by a Sigma 2X apo converter making it a pretty useful 300mm F4?

Yes I asked about it here https://www.pentaxuser.com/forum/viewtopic.php?t=8274 but it seems the lens is not available in Pentax mount.
I may email Sigma them selves, you never know I may just get a reply.

After being out this morning with my 90mm Tamron macro and a dragonfly landing just too far out of decent shot range I have decided to bite the bullet, lie to the wife and invest in a Sigma 180mm macro. It's either that or sell all my gear, move to Canon or Nikon and get the much cheaper 150mm F2/8 version (Grrrr).
Best price I can find is http://tinyurl.com/66jpy9 so I was wondering if anyone has had dealings with them.
I know there is a bit of a wait but im not in that much of a hurry.

Thanks.

Love the last two, those eyes are quite something.
Could maybe do with a little "tweaking" though ?

Just stamping on my forehead: Must keep original PEF files, must keep original PEF files, must keep ....

Vivitar 100m F2/8 MF macro with 2X Vivitar macro teleconverter attached.
Teleconverter not used in macro mode, just for extra reach.

Wondering if I am cropping too tightly though?

Very nice photos but the macro ones I would say are no better than your usual shots (excellent as normal).
As you say though, it makes an good dual purpose lens and the bird ones are nice and crisp.

Looks like it may have been worth the wait