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03-05-2019, 07:35 AM   #271
dlh
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QuoteOriginally posted by jmpince Quote
Hi everybody, my name is Jose, I am a new user of the forum who is looking for buying a Irix 15mm firefly, could anybody upload some photos of the body of the lens, especially of the mount, I would like to be sure that it will fit in my k5iis, and I would like to see it, because there is no information about our mount. Best regards everybody.
I have an Irix 11mm "Blackstone" and use it on a K-1 and a K-50 - works great on both.

03-18-2019, 12:07 AM - 7 Likes   #272
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A little light painting in the desert
K1 and Irix 15

04-13-2019, 08:46 AM - 15 Likes   #273
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IRIX 15mm

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04-23-2019, 07:04 AM - 11 Likes   #274
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07-28-2019, 11:26 PM - 7 Likes   #275
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I found Irix 15/2.4 Blackstone ideal for photographing miniature dioramas, those in the pictures are 1:25. Great thing is you can control the DOF as much as you like. At practical distances of 25-100 cm, the DOF can be entirely flat (f/2.8), intermediate (f/5.6) or encompass the whole diorama depth (f/11). All pictures from Pentax K-1.
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08-08-2019, 04:41 PM - 8 Likes   #276
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08-11-2019, 02:04 PM - 6 Likes   #277
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K-3II & 150mm f2.8 Dragonfly Macro



Last edited by longbow; 08-11-2019 at 02:38 PM.
09-04-2019, 12:27 AM - 8 Likes   #278
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Observatoire populaire du Mont-Mégantic sous la Voie Lactée / Popular Observatory of Mont-Mégantic under the Milky Way

Parc National du Mont-Mégantic, Québec, CANADA

2019.08.29

During an activity called "Popular Observatory Evening" proposed by the ASTROLab at Mont-Megantic, I rather choose to stay a bit apart and willing to capture the starfield and Milky Way on top of this magnificent mountain. Unfortunately, after a last-minute tripod change, I forgot to bring the appropriate quick release plate to fix the camera on that tripod head (damn!).

However, with the gear accessories I had on hand, like a couple of spring clips and an L-bracket, I was able to just stabilize my gear enough, I'd say in an hazardous way, in order to make those long exposure shots (30s and more @ ƒ/2.8 and ISO 1600 to 2500) in order to get quite nice shots of the Milky Way and surrounding starscapes.

Pentax K-1 (in bulb mode with ASTROTRACER enabled and calibrated) + Irix 15mm ƒ/2.4 Blackstone Lens

(Single frame)

30s @ ƒ/2.8 and ISO 2500

#pentax #astrotracer #k1



Observatoire populaire du Mont-Mégantic sous la Voie Lactée / Popular Observatory of Mont-Mégantic under the Milky Way

09-06-2019, 12:49 AM - 3 Likes   #279
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Two outings with my IRIX 15mm f2.4 Blackstone on K1; a couple of seascapes to start, followed by a visit to an old/new road bridge. Far South Coast, NSW Australia.









09-22-2019, 12:37 AM - 6 Likes   #280
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Based on the awesome pics here, I have decided to get the 15mm Blackstone. It is a blast shooting at 15mm. So far am pleased with the purchase. Here some samples:


10-01-2019, 10:45 AM - 2 Likes   #281
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A couple of aurora shots I got this week in Nellim, Lapland. Both with K1 and IRIX 15mm Blackstone. Both uncropped.



10-11-2019, 08:17 AM - 5 Likes   #282
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Here are four more Aurora Borealis shots; all K1 with IRIX 15mm Blackstone but no astrotracer.
Taken in Nellim, Lapland, northern Finland.





10-27-2019, 11:32 PM - 5 Likes   #283
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Morning Reflections,
White Pocket, Arizona
Irix 15mm

11-01-2019, 08:35 AM   #284
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Something a bit more pedestrian - local doggy park.
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11-06-2019, 08:15 AM   #285
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I hope i have a good copy on the way of the 15mm blackstone (second handed at 370euro, couldn't let that one got passed). Considering the 150 macro aswell so keep them posted.
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