Irix 15mm

Started Oct 3, 2016 | Discussions
miles green
miles green Veteran Member • Posts: 7,266
Irix 15mm
4

Well, the sample pictures are out, and there won't be any Irix for me...

Come on Pentax, all i want is a top-quality 20mm f/2.8. Or even f/4.

I don't need it to be fast, but i want excellent flare control, minimal distortion for easy stitching and, at f/8 and f/11, sharp into the K-1's corners with little vignetting.

Of course, it should be WR and AF and small-sized and filter-friendly.

If there is one company that could resist the urge to join the current race in producing the widest fastest  UWA prime lens, and make a sensible landscape lens instead, i think it is Pentax.

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Miles Green
Pentaxian with chronic LBA
Corfu, Greece
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KL Matt Veteran Member • Posts: 5,916
How did the Irix get its spots?
1

I dunno, I wouldn't condemn it straight off. I mean how often do you shoot dead-center straight into the sun? You seriously need to be careful not to damage your eyesight doing that, strictly a live-view only thing. Of course the DA 15 can do that, but it's a very exceptional lens in that respect.

The other samples look great, and I like the other flare effects. Do you find that they all detract? Kinda like seeing all lenses in the optical formula as flare blobs...

Matt

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sfa1966
sfa1966 Veteran Member • Posts: 3,453
Re: Irix 15mm
1

That's weird and funky alright, though it may be quite a rare case (sun slap-bang in the centre of frame).

The rest of the samples look pretty good. But all the same, I'm going to keep my Sigma 8-16 and shoot in crop mode on K-1. I'll take a hit in pixels, of course, but it works for me.

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sfa

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MightyMike Forum Pro • Posts: 39,547
Re: Irix 15mm

Thats a big oops, it was mildly on my radar but Lenstips review confirmed what i suspected about it from what I'd seen in the published material. Its not spectacular, its not bad but for me its not worth investing in.

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Mike from Canada
"I am not a great photographer! God is a great creator! All I do is capture His creation with the tools He has provided me."
'I like to think so far outside the box that it would require a telephoto lens just to see the box!' ~ 'My Quote :)'
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MightyMike Forum Pro • Posts: 39,547
Re: How did the Irix get its spots?

KL Matt wrote:

I dunno, I wouldn't condemn it straight off. I mean how often do you shoot dead-center straight into the sun? You seriously need to be careful not to damage your eyesight doing that, strictly a live-view only thing. Of course the DA 15 can do that, but it's a very exceptional lens in that respect.

The other samples look great, and I like the other flare effects. Do you find that they all detract? Kinda like seeing all lenses in the optical formula as flare blobs...

Matt

Here

http://www.lenstip.com/486.9-Lens_review-Irix_15_mm_f_2.4_Blackstone_Ghosting_and_flares.html

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Mike from Canada
"I am not a great photographer! God is a great creator! All I do is capture His creation with the tools He has provided me."
'I like to think so far outside the box that it would require a telephoto lens just to see the box!' ~ 'My Quote :)'
http://www.michaelfastphotography.com/galleries/VP-BDI_3a.jpg
http://www.airliners.net/search/photo.search?sort_order=views%20DESC&first_this_page=0&page_limit=180&&emailsearch=mighty_mike88%40hotmail.com&thumbnails=

KL Matt Veteran Member • Posts: 5,916
Re: Irix 15mm

Very interesting review, especially the part about it being optimized for distant objects! This is intended primarily as a landscape / architecture lens.

M

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... interested in .... photographs? Heh? Know what a mean? Photographs? (He asked him knowingly). Nudge nudge, snap snap, grin grin, wink wink, say no more, say no more, know what a' mean? Know what a' mean?
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Mordecai Papamichaels Regular Member • Posts: 329
Re: How did the Irix get its spots?
1

KL Matt wrote:

I mean how often do you shoot dead-center straight into the sun?

Not dead-center but with a 15mm lens many times you are going to have the sun flaring on your camera.... or you can gently ask the nice mountain you are photographing to move where the sun dont shine

RemcoR Senior Member • Posts: 1,217
Re: Irix 15mm
3

Hmmm, not giving up on the Irix yet, but need to see some more test results to give up my Sammy 14/2.8. It has less trouble shooting straight into the sun.

RemcoR

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Samyang 14mm f/2.8 IF ED UMC Aspherical
Pentax FA 35mm F2 AL
Carl Zeiss Vario-Sonnar T* 35-70mm F3.4 Macro
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miles green
OP miles green Veteran Member • Posts: 7,266
Re: Irix 15mm

Those are very nice, taken with the K5? To be honest i prefer the less extreme POV. Sammy 20/1.8 will be my preferred update path for the time being, but i'll be anxious for news from CP+.

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Miles Green
Pentaxian with chronic LBA
Corfu, Greece
N.B. All my images are protected by Copyright

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miles green
OP miles green Veteran Member • Posts: 7,266
Re: Irix 15mm

KL Matt wrote:

Very interesting review, especially the part about it being optimized for distant objects!

yes that was interesting, and a plus for the lens imho. But i don't want to have to wait for those 15 minutes after sunset to take a pic...

This is intended primarily as a landscape / architecture lens.

M

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... interested in .... photographs? Heh? Know what a mean? Photographs? (He asked him knowingly). Nudge nudge, snap snap, grin grin, wink wink, say no more, say no more, know what a' mean? Know what a' mean?
http://www.pentaxphotogallery.com/home#section=ARTIST&subSection=183820&subSubSection=0&language=EN

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Miles Green
Pentaxian with chronic LBA
Corfu, Greece
N.B. All my images are protected by Copyright

 miles green's gear list:miles green's gear list
Pentax K-1 Pentax K-1 II Pentax smc FA 31mm F1.8 AL Limited Pentax smc FA 43mm F1.9 Limited Pentax smc FA 77mm 1.8 Limited +7 more
RemcoR Senior Member • Posts: 1,217
Re: Irix 15mm
2

Yes, taken with the K-5. I feel the same, would 14mm be too much on FF, as I already get very wide results on the cropped K-5. It is now my most used lens for landscapes and seldom want/need to go wider.

I mean, I already can get the intire Castlerigg Stone Circle on it. What more do I need?

For now FF is only for the future, because the damn K-5 just will not break down and keeps going and going.

RemcoR

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Pentax K-5
Samyang 14mm f/2.8 IF ED UMC Aspherical
Pentax FA 35mm F2 AL
Carl Zeiss Vario-Sonnar T* 35-70mm F3.4 Macro
Carl Zeiss Planar T* 50mm F1.7 Contax
Carl Zeiss Planar T* 85mm F1.4 ZK
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fotobert
fotobert Contributing Member • Posts: 941
My selection of lenses...
7

Miles,

I currently own some 20 lenses, each of them has strong and weak points. I guess all of them are better in most regards than the lenses that the great photographers of the last century used to create legendary photos. But I keep some of them just because of their flaws and weaknesses.

My 1,2/55 Porst has a nervous bokeh with strong outllines, my Holga shows strong vignetting and ghosting, But I am about to adapt my old Leica Colorplan 2,5/90 from my Pradovit to Pentax mount.

What I want to say is - I tested the Samyang and the Irix UWA and I will buy one of these. The art of photographing is not to have a perfect equipment, but to make the best of your gear. So the Irix might not be a perfect lens, it has its flaws like every UWA has. It might not be your choice, but it is a good lens in many regards. The Pentax 4.0/15 is exceptional good against bright light, but is has weak corners. The Samyang has some odd distortion (Lightroom can fix this). The Zeiss 15mm might be a very good choice, but the price is a bit out of my budget.

UWA is always a compromise

Have a nice day

Albert

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MightyMike Forum Pro • Posts: 39,547
Re: How did the Irix get its spots?

Mordecai Papamichaels wrote:

KL Matt wrote:

I mean how often do you shoot dead-center straight into the sun?

Not dead-center but with a 15mm lens many times you are going to have the sun flaring on your camera.... or you can gently ask the nice mountain you are photographing to move where the sun dont shine

The Pentax DA15mm F4.0 Ltd apparently is the exception to this, however it may not be a perfect wide lens wrt flare but its probably one of the best by a fair margin

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Mike from Canada
"I am not a great photographer! God is a great creator! All I do is capture His creation with the tools He has provided me."
'I like to think so far outside the box that it would require a telephoto lens just to see the box!' ~ 'My Quote :)'
http://www.michaelfastphotography.com/galleries/VP-BDI_3a.jpg
http://www.airliners.net/search/photo.search?sort_order=views%20DESC&first_this_page=0&page_limit=180&&emailsearch=mighty_mike88%40hotmail.com&thumbnails=

MightyMike Forum Pro • Posts: 39,547
Re: Irix 15mm

The second image's EXIF says 35mm

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Mike from Canada
"I am not a great photographer! God is a great creator! All I do is capture His creation with the tools He has provided me."
'I like to think so far outside the box that it would require a telephoto lens just to see the box!' ~ 'My Quote :)'
http://www.michaelfastphotography.com/galleries/VP-BDI_3a.jpg
http://www.airliners.net/search/photo.search?sort_order=views%20DESC&first_this_page=0&page_limit=180&&emailsearch=mighty_mike88%40hotmail.com&thumbnails=

Mordecai Papamichaels Regular Member • Posts: 329
Re: How did the Irix get its spots?

MightyMike wrote:

Mordecai Papamichaels wrote:

KL Matt wrote:

I mean how often do you shoot dead-center straight into the sun?

Not dead-center but with a 15mm lens many times you are going to have the sun flaring on your camera.... or you can gently ask the nice mountain you are photographing to move where the sun dont shine

The Pentax DA15mm F4.0 Ltd apparently is the exception to this, however it may not be a perfect wide lens wrt flare but its probably one of the best by a fair margin

Agreed. I was actually stressing out the importance of flare-control on an UWA lens.

One small thing though, 15mm in FF is completely different beast than in APS-C.

An another small thing, I had many of the best lenses Pentax had to offer up to 6-7 years ago. The DA15mm was without doubt on my top 3 (the 31 limited and the FA300 4.5 being the others)

RemcoR Senior Member • Posts: 1,217
Re: Irix 15mm

Didn't reset the MF on 15mm before using the Samyang 14mm. Doesn't influence the results imo so I tend to forget to set it after changing lenses. Sammy handles flare well as you can see.

RemcoR

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Pentax K-5
Samyang 14mm f/2.8 IF ED UMC Aspherical
Pentax FA 35mm F2 AL
Carl Zeiss Vario-Sonnar T* 35-70mm F3.4 Macro
Carl Zeiss Planar T* 50mm F1.7 Contax
Carl Zeiss Planar T* 85mm F1.4 ZK
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MightyMike Forum Pro • Posts: 39,547
Re: Irix 15mm

RemcoR wrote:

Didn't reset the MF on 15mm before using the Samyang 14mm. Doesn't influence the results imo so I tend to forget to set it after changing lenses. Sammy handles flare well as you can see.

RemcoR

It should only effect the results if you're using SR

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Mike from Canada
"I am not a great photographer! God is a great creator! All I do is capture His creation with the tools He has provided me."
'I like to think so far outside the box that it would require a telephoto lens just to see the box!' ~ 'My Quote :)'
http://www.michaelfastphotography.com/galleries/VP-BDI_3a.jpg
http://www.airliners.net/search/photo.search?sort_order=views%20DESC&first_this_page=0&page_limit=180&&emailsearch=mighty_mike88%40hotmail.com&thumbnails=

Richard Murdey
Richard Murdey Senior Member • Posts: 2,915
Re: Irix 15mm

miles green wrote:

Come on Pentax, all i want is a top-quality 20mm f/2.8. Or even f/4.

The DA15 on APSC crop fits the bill. Though Pentax does have a FF fast ultrawide on the roadmap so you might be in luck yet.

I don't need it to be fast, but i want excellent flare control, minimal distortion for easy stitching and, at f/8 and f/11, sharp into the K-1's corners with little vignetting.

Of course, it should be WR and AF and small-sized and filter-friendly.

I'm told you can buy unicorns too if you have enough money.

Seriously though, an AF 20mm f/4 could be compact but you'd have to relax your distortion constraints a little, and corner sharpness wouldn't be great until f/11 or so.

A really high quality AF 20/2.8 will probably be bigger than the Zeiss 21/2.8, since the AF part will add bulk. That's pretty big and heavy, not to mention expensive.

I think the Irix is pretty good value for money. Manual focus, and you need to keep the light source off center, but CA and geometric distortion is nicely corrected. Contrast seem a bit meh though I wonder if dpreview's copy had a dirty front element - this would certainly explain a few things vis. the sample gallery

15mm is too much for me though. I can ran rarely find much use from my 20mm equiv. DA15 even.

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miles green
OP miles green Veteran Member • Posts: 7,266
Re: My selection of lenses...

fotobert wrote:

Miles,

I currently own some 20 lenses,

me too, including 4 UWA/FE lenses!

each of them has strong and weak points. I guess all of them are better in most regards than the lenses that the great photographers of the last century used to create legendary photos. But I keep some of them just because of their flaws and weaknesses.

My 1,2/55 Porst has a nervous bokeh with strong outllines, my Holga shows strong vignetting and ghosting, But I am about to adapt my old Leica Colorplan 2,5/90 from my Pradovit to Pentax mount.

Agreed. I even keep one that's all fogged up from moisture, as it produces some very nice soft portraits. Even the FA limiteds have their flaws that can be used to your advantage (the 43 has low contrast wide open, and slightly soap-bubble bokeh. Still the most 3D lens i have i think, and my favourite especially on the K-1. The 77 fringes a bit and has some longitudinal CA, its bokeh is more the cats-eye type and it will discretely show some swirling on FF.)

What I want to say is - I tested the Samyang and the Irix UWA and I will buy one of these. The art of photographing is not to have a perfect equipment, but to make the best of your gear. So the Irix might not be a perfect lens, it has its flaws like every UWA has. It might not be your choice, but it is a good lens in many regards. The Pentax 4.0/15 is exceptional good against bright light, but is has weak corners. The Samyang has some odd distortion (Lightroom can fix this). The Zeiss 15mm might be a very good choice, but the price is a bit out of my budget.

If you're shooting away from the sun it looks excellent! But just out of couriosity, I shot my SMC-M 20/4 straight into the rising sun this morning looking for flare... And nothing. Lots of contrast and no flare. For my taste, for a landscape lens, the lowly M20/4 is the one I'd put in my bag first between the 2, despite the known very soft corners on FF and overall lower resolving power. On the other hand, the IRIX looks class-leading for architecture, with its excellent resolution and more importantly its distortion control. But for that application, its filter-friendliness is not so important... Anyway, i'm just saying it's not my cup of tea, that's all.

UWA is always a compromise

it seems so!

Have a nice day

You too!

Albert

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Miles Green
Pentaxian with chronic LBA
Corfu, Greece
N.B. All my images are protected by Copyright

 miles green's gear list:miles green's gear list
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KL Matt Veteran Member • Posts: 5,916
Re: How did the Irix get its spots?

Mordecai Papamichaels wrote:

MightyMike wrote:

Mordecai Papamichaels wrote:

KL Matt wrote:

I mean how often do you shoot dead-center straight into the sun?

Not dead-center but with a 15mm lens many times you are going to have the sun flaring on your camera.... or you can gently ask the nice mountain you are photographing to move where the sun dont shine

The Pentax DA15mm F4.0 Ltd apparently is the exception to this, however it may not be a perfect wide lens wrt flare but its probably one of the best by a fair margin

Funny thing is, just before I wrote this, I had had my DA 15 in the woods. The sun came out and... guess what I did. I pointed the camera right straight dead centre at the sun. Because I can. The sun threw the K5's AF way off, but flare didn't impact the image at all.

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