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**pepperberry farm** · 02-17-2020, 03:35 PM - **3 Likes**

SharkyCA · 02-20-2020, 09:14 AM - **1 Like**

Originally posted by pepperberry farm

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

**pepperberry farm** · 02-20-2020, 10:04 AM - **2 Likes**

Originally posted by SharkyCA

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....

sculptor666 · 03-17-2020, 11:20 AM - **6 Likes**

just started using this one, can't wait for spring

**pepperberry farm** · 03-17-2020, 11:25 AM - **1 Like**

Originally posted by sculptor666

just started using this one, can't wait for spring

excellent work - I cannot wait for spring, too...

sculptor666 · 03-17-2020, 11:51 AM - **1 Like**

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.

stevebrot · 03-17-2020, 12:15 PM - **1 Like**

Originally posted by JensE

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.)

Steve

**JensE** · 03-17-2020, 12:40 PM

Originally posted by stevebrot

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.

sculptor666 · 03-17-2020, 05:35 PM - **1 Like**

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"

**pepperberry farm** · 04-10-2020, 03:54 AM - **2 Likes**

morning light shots:

**pepperberry farm** · 04-10-2020, 03:55 AM - **1 Like**

**pepperberry farm** · 04-10-2020, 03:55 AM - **1 Like**

**pepperberry farm** · 04-10-2020, 03:57 AM - **3 Likes**

Tomzohh · 05-10-2020, 01:19 AM - **8 Likes**

A few shots of mine

**pepperberry farm** · 05-17-2020, 05:28 AM

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02-17-2020, 03:35 PM - 3 Likes	#61
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,780 Original Poster

02-20-2020, 10:04 AM - 2 Likes	#63
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,780 Original Poster	Originally posted by SharkyCA 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
sculptor666 Pentaxian Join Date: Dec 2013 Location: PA Photos: Gallery Posts: 675	just started using this one, can't wait for spring

03-17-2020, 11:25 AM - 1 Like	#65
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,780 Original Poster	Originally posted by sculptor666 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
sculptor666 Pentaxian Join Date: Dec 2013 Location: PA Photos: Gallery Posts: 675	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
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by JensE 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.) Steve

03-17-2020, 12:40 PM	#68
JensE Site Supporter Join Date: Dec 2015 Location: Leipzig Photos: Gallery \| Albums Posts: 1,977	Originally posted by stevebrot 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
sculptor666 Pentaxian Join Date: Dec 2013 Location: PA Photos: Gallery Posts: 675	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
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,780 Original Poster	morning light shots:

04-10-2020, 03:55 AM - 1 Like	#71
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,780 Original Poster

04-10-2020, 03:55 AM - 1 Like	#72
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,780 Original Poster

04-10-2020, 03:57 AM - 3 Likes	#73
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,780 Original Poster

05-17-2020, 05:28 AM	#75
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,780 Original Poster

Irix 150mm f2.8 Macro 'Dragonfly'

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