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02-17-2020, 03:35 PM - 2 Likes   #61
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02-20-2020, 09:14 AM - 1 Like   #62
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QuoteOriginally posted by pepperberry farm Quote
ok - an idea of this lens' size:

I have to ask, Pepperberry,do you buy a box of cookies every time you get a new lens? Seems it must add to the cost!

Just for the other readers info I came across this link at Flickr: Irix 150mm f/2.8 Macro 1:1 sample shots | Flickr
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02-20-2020, 10:04 AM - 2 Likes   #63
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QuoteOriginally posted by SharkyCA Quote
I have to ask, Pepperberry,do you buy a box of cookies every time you get a new lens? Seems it must add to the cost!

Just for the other readers info I came across this link at Flickr: Irix 150mm f/2.8 Macro 1:1 sample shots | Flickr
yes, I do....
03-17-2020, 11:20 AM - 6 Likes   #64
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just started using this one, can't wait for spring





03-17-2020, 11:25 AM - 1 Like   #65
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QuoteOriginally posted by sculptor666 Quote
just started using this one, can't wait for spring




excellent work - I cannot wait for spring, too...
03-17-2020, 11:51 AM - 1 Like   #66
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thanks, i enjoy your images too! so far i like it a lot. at 1:1 it's about the same length as the dfa100 at 1:1, and doen't seem to block the flash/diffuser at all.
03-17-2020, 12:15 PM - 1 Like   #67
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QuoteOriginally posted by JensE Quote
Unfortunately not, that's why I'm asking here, but I took the 34.5cm minimal focusing distance out of the data sheet :-)
MFD is the distance from subject to focal plane. Subtract the overall length of the lens and hood + flange focal distance (44.6mm) to get the working distance. (BTW...not that great for the Irix 150mm.)


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03-17-2020, 12:40 PM   #68
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QuoteOriginally posted by stevebrot Quote
MFD is the distance from subject to focal plane. Subtract the overall length of the lens and hood + flange focal distance (44.6mm) to get the working distance. (BTW...not that great for the Irix 150mm.)


Steve
That's basically what I did - based on pepperberry farm's measurements. As you noted, it's not that great. The reason is the focusing design. Focal length is 156mm at infinity, but only 91mm at 1:1 according to data from Irix at Photokina 2018 as reported in the German pentaxians forum.
03-17-2020, 05:35 PM - 1 Like   #69
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doing very quick unscientific measurements (i'll do better ones before too long). distance from end of lens to subject in focus at 1:1


pentax dfa 100mm 5"
irix 150mm 7"
sigma 180mm 7.5"
04-10-2020, 03:54 AM - 2 Likes   #70
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morning light shots:



04-10-2020, 03:55 AM - 1 Like   #71
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04-10-2020, 03:55 AM - 1 Like   #72
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04-10-2020, 03:57 AM - 3 Likes   #73
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05-10-2020, 01:19 AM - 8 Likes   #74
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A few shots of mine
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05-17-2020, 05:28 AM   #75
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