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03-22-2016, 04:20 AM   #1
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Irix 15mm f/2.4

This may have just sealed the deal on getting a K-1 for me. Will make a perfect match for my 645z kit so that I can go wide.

I don't know about you guys but filters are important for me, mainly for long exposures and the 15-30 is just going to be a pain.

This new Irix has some lovely well thought features too!

Let's hope the image quality is great.

03-22-2016, 05:24 AM   #2
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is it auto focus?
03-22-2016, 05:57 AM   #3
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It is manual a focus lens.

More info here:
Irix

Available in Pentax K-mount, Canon and Nikon.
It certainly looks good on paper - now if someone can test it for us...
Probably not a "cheap" lens.
03-22-2016, 06:14 AM   #4
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Looks interesting. Huge filter size of 95mm though. But the 15-30 doesn't have any, so that's an advantage. If you get one, make sure you post your experiences .

03-22-2016, 06:14 AM   #5
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$600 for the Firefly and $780 for the Blackstone.

M
03-22-2016, 07:30 AM   #6
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Already a discussion about the lens here: Irix 15mm f/2,4 for full frame K-mount
03-22-2016, 08:06 AM   #7
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QuoteOriginally posted by MJSfoto1956 Quote
$600 for the Firefly and $780 for the Blackstone.

M
What is the difference between these two versions? Cannot make it out from the website.

Eureka! Just figured it out. Basically metal versus plastic construction, plus a few minor details. Don't know about the rest of you, but don't think I'd pay extra for the metal, and the little finger tab on the Firefly focusing ring seems to me a good feature.
03-22-2016, 09:52 AM   #8
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QuoteOriginally posted by WPRESTO Quote
What is the difference between these two versions? Cannot make it out from the website.

Eureka! Just figured it out. Basically metal versus plastic construction, plus a few minor details. Don't know about the rest of you, but don't think I'd pay extra for the metal, and the little finger tab on the Firefly focusing ring seems to me a good feature.
Both have the same optics. More expensive version is WR, metal, and has fluorescent markings (good for astro photography I suppose?)

M

03-22-2016, 01:26 PM   #9
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I think the blackstone will be the go, I like the idea of the fluro markings an WR.

I personally am going away from the Lee type filter system and back to screw in filters. Just not using the grads as much these days with the DR on these new sensors, but still need NDs though.
03-23-2016, 04:05 AM   #10
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$600 is "in the ballpark" for a high quality, FF 15mm rectilinear WA. The long discontinued 15mm Pentax generally goes for more second hand. Wish that independen, tinexpensive lens makers, Samyang et al for example, would but some effort into quality long FL MF optics, a 400 or 500mm f5.6 for example. Kowa offers an interesting 500mm based on their spotting scopes, complete with ED glass, but has anyone ever seen a test on one or a photo taken with one other than those from the manufacturer (and what's been done to those in PP)?

---------- Post added 03-23-16 at 07:15 AM ----------

QuoteOriginally posted by 2351HD Quote
I think the blackstone will be the go, I like the idea of the fluro markings an WR.
Here's a silly thought. For astro and night photography, Pentax routes some of those tiny lights in the K1 through fiber optics in certain "night photography" lenses so that all the lens "engraving" (actually little windows) are illuminated in the dark, obviously only on lenses that still have an aperture ring, DOF scales and hyperfocal marks along the distance scale. Useful when it's too dark for the AF to function or see anything through the viewfinder (=must scale focus), but not too dark for an ISO over 200,000. Silly thought, but it popped into my head when I read about the fluorescent paint in the engraved markings.
03-25-2016, 05:59 PM   #11
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I think the 15-30 might be the better option still for flexibility. Haida do a filter holder kit for the tamron version which I assume fits the same.
04-08-2016, 12:47 AM   #12
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QuoteOriginally posted by Gyroscope Quote
Haida do a filter holder kit for the tamron version which I assume fits the same.
The diameter is not the same : 114 for Irix and 98.4 for Tamron...
04-09-2016, 12:00 AM   #13
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QuoteOriginally posted by fs999 Quote
The diameter is not the same : 114 for Irix and 98.4 for Tamron...
I meant that the haida filter kit for tamron 15-30 should fit the pentax 15-30 which overcomes the issues people have with not being able to put filters on. Having said that the cost of the Haida kit probably isn't much more than the Irix itself.
04-09-2016, 12:45 AM   #14
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The problem there is that while 100x150mm filters are ok to carry, 150x170mm filters are HUGE and a bit of a pain.

At least the Irix can have a 95mm polariser attached, or a 95mm ND filter.
04-09-2016, 03:06 AM   #15
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And those filtres are also sold by Irix.

Last edited by Zygonyx; 04-09-2016 at 11:14 PM.
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