Pentax 100mm F-4 macro

<p>any body know where i can find info on this lens tried Pentax<br>

I got no where, on the front of the lens it state's SMC Pentax-M<br>

need to understand it to use it correctly: Thanks</p>

<p>What info do you need? As a macro, it only goes to 1:2, not 1:1. You can get to 1:1 with an extension tube. As you probably know, it's manual focus and on a modern Pentax, you won't have automatic aperture either - you'll need to use the green button.<br>

If you Google:<br>

"smc-M 100mm macro manual f/4", you'll get more info.</p>

<p>Howard</p>

<p>thank you Howard very much what I was to find is lens info that usually comes with the lens when you buy it:</p>

Hi Lauren

 

Try Googling Boz and Pentax, You should come to Boz's excellent web page that has information. I have the optically

identical A version of this lens, but as noted by Howard you M version has no electronic connectors so you will need

to use it in manual exposure mode (the A version allows you to use auto exposure options). So the lens is more work,

but once you nail it down it is optically a brilliant lens. And the lens is a real pleasure to manually focus, perhaps the

most enjoyable manual lens I own to manually focus.

<p>Douglas : Thanks for the info on the boz site :</p>

<p>I had this lens for a while and it doesn't have the M keyword and the rear is typical of Pentax K lenses. You need to use green button for metering. It is a great lens especially in the focusing ring and build.<br>

<img src="http://farm4.staticflickr.com/3255/2434707207_0b90f0d875_z.jpg" alt="" width="640" height="623" /><br>

with K10 and I mentioned it in <strong><a href="http://www.techtheman.com/2008/04/pentax-smc-100mm-f40-macro-12.html">my blog post</a></strong> before</p>

<p>Hin Man : i was playing with and got this to-nite not great but it will get there</p><div></div>

<p>I really like mine too. Mine does have PENTAX-M next to the front element. It even has some fungus in it but as long as direct light isn't hitting the front element I can't see it in the photos.<br>

<a title="IMGP2790.jpg by MattB.net, on Flickr" href=" src="http://farm7.staticflickr.com/6210/6113374415_90ae0d67f1_z.jpg" alt="IMGP2790.jpg" width="425" height="640" /></a></p>

 

<p>Hin, that's a beautiful shot. I use a 90/2.5 Tamron SP [52BB] with my Pentax K-x.</p>

<p>An inexpensive Pentax screw-to-K adapter will open up the 100mm f4 SMC to you. You will have the same manual focus and metering issues as your M, but you may be able to find it cheaper. Mine was about $75. I don't think you can go wrong with any macro in that 90-100mm range.</p>

<p>You all have been right about this lens SMC-Pentax-M 100mm F-4 macro<br /> this is shot as regular not macro but I like it very much:</p>

<p>Now for the Photo</p><div></div>

<p><a href="http://kmp.bdimitrov.de/lenses/primes/short-tele/M100f4-Macro.html">http://kmp.bdimitrov.de/lenses/primes/short-tele/M100f4-Macro.html</a></p>

<p>I have one of these too (mine is Pentax-M). Optically leaves little to be desired, is more compact and costs less than half what a f/2.8 1:1 Pentax-A or newer will go for. 1:2 is close enough most of the time.</p>

<p>I thank you all for answering on this topic here ; thanks again: Lauren</p>

<p>Here is the M: http://www.pentaxforums.com/lensreviews/SMC-Pentax-M-100mm-F4-Macro-Lens.html<br>

I have the K: http://www.pentaxforums.com/lensreviews/SMC-Pentax-K-100mm-F4-Macro-Lens.html<br>

Both are great lenses. :)</p>