Filters for Irix 15mm f/2.4

leonine · 02-14-2020, 04:45 AM

Hello all,

I bought an Irix 15mm f/2.4 a few days ago for use on the Pentax K-1. I also have the 28-45mm for the Pentax 645Z, but wanted a wider lens which was easier to handle than the Pentax 15-30 on the K-1.

I also bought the following from Breakthrough Photography a few months ago for use with the MF lenses for 645Z:-

(1) Step-Up Ring 67mm to 82mm (for use with 55mm 645 lens)

(2) X4 Neutral Density filter - 100mm Square / 6-stop

(3) X100 filter Holder - 82mm Aluminum Square Adapter Ring (for use with 28-45mm 645 lens)

(4) X100 Holder

I already had the old Singh-Ray 100mm square filters - GND, Tobacco/ Blue/ Gray Graduated etc from the film area.

The Irix dia is 95mm. There is no 95mm adapter ring available from Breakthrough Photography; however, the same is available form Lee and maybe a few more local companies.

My question is:- Will the Lee 95mm adapter ring (meant for the Lee filter Holder) allow the use of the Breakthrough Photography X100 filter holder for Pentax K-1?

Regards,
Leonine

leonine · 02-14-2020, 08:00 AM

Specifically, how good would be the following item?

It is very cheap and hence can't say how it will perform. Then again, established brands charge crazy prices like USD 100 plus for just a step up adapter ring.

Zomei 100mm Square Filter Holder+95mm Ring for 4X4 LEE Cokin Z HITECH system 699964374977 | eBay

**TerryL** · 02-14-2020, 09:41 AM

Originally posted by leonine

Hello all,

I bought an Irix 15mm f/2.4 a few days ago for use on the Pentax K-1. I also have the 28-45mm for the Pentax 645Z, but wanted a wider lens which was easier to handle than the Pentax 15-30 on the K-1.

I also bought the following from Breakthrough Photography a few months ago for use with the MF lenses for 645Z:-

(1) Step-Up Ring 67mm to 82mm (for use with 55mm 645 lens)

(2) X4 Neutral Density filter - 100mm Square / 6-stop

(3) X100 filter Holder - 82mm Aluminum Square Adapter Ring (for use with 28-45mm 645 lens)

(4) X100 Holder

I already had the old Singh-Ray 100mm square filters - GND, Tobacco/ Blue/ Gray Graduated etc from the film area.

The Irix dia is 95mm. There is no 95mm adapter ring available from Breakthrough Photography; however, the same is available form Lee and maybe a few more local companies.

My question is:- Will the Lee 95mm adapter ring (meant for the Lee filter Holder) allow the use of the Breakthrough Photography X100 filter holder for Pentax K-1?

Regards,
Leonine

Irix makes their own 100mm filter holder. It’s very well made and you can order it on their website.

leonine · 02-14-2020, 10:40 AM

Originally posted by TerryL

Irix makes their own 100mm filter holder. It’s very well made and you can order it on their website.

I just spent a tidy sum on the Breakthrough Photography filter holder system. I am hoping to optimize that system for the Irix.

**stevebrot** · 02-14-2020, 12:38 PM

Originally posted by leonine

The Irix dia is 95mm. There is no 95mm adapter ring available from Breakthrough Photography

Originally posted by leonine

I just spent a tidy sum on the Breakthrough Photography filter holder system. I am hoping to optimize that system for the Irix.

It is a shame that they don't make something to fit your lens and a pity you did not know this before you committed to their system.

Steve

leonine · 02-15-2020, 12:32 PM

Originally posted by stevebrot

It is a shame that they don't make something to fit your lens and a pity you did not know this before you committed to their system.

Steve

Indeed it is. But i need to find a way out of it.

02-14-2020, 04:45 AM	#1
leonine Senior Member Join Date: Mar 2018 Posts: 149	Filters for Irix 15mm f/2.4 Hello all, I bought an Irix 15mm f/2.4 a few days ago for use on the Pentax K-1. I also have the 28-45mm for the Pentax 645Z, but wanted a wider lens which was easier to handle than the Pentax 15-30 on the K-1. I also bought the following from Breakthrough Photography a few months ago for use with the MF lenses for 645Z:- (1) Step-Up Ring 67mm to 82mm (for use with 55mm 645 lens) (2) X4 Neutral Density filter - 100mm Square / 6-stop (3) X100 filter Holder - 82mm Aluminum Square Adapter Ring (for use with 28-45mm 645 lens) (4) X100 Holder I already had the old Singh-Ray 100mm square filters - GND, Tobacco/ Blue/ Gray Graduated etc from the film area. The Irix dia is 95mm. There is no 95mm adapter ring available from Breakthrough Photography; however, the same is available form Lee and maybe a few more local companies. My question is:- Will the Lee 95mm adapter ring (meant for the Lee filter Holder) allow the use of the Breakthrough Photography X100 filter holder for Pentax K-1? Regards, Leonine

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02-14-2020, 08:00 AM	#2
leonine Senior Member Join Date: Mar 2018 Posts: 149 Original Poster	Specifically, how good would be the following item? It is very cheap and hence can't say how it will perform. Then again, established brands charge crazy prices like USD 100 plus for just a step up adapter ring. Zomei 100mm Square Filter Holder+95mm Ring for 4X4 LEE Cokin Z HITECH system 699964374977 \| eBay

02-14-2020, 09:41 AM	#3
TerryL Site Supporter Join Date: Jan 2018 Location: Virginia, USA Photos: Albums Posts: 847	Originally posted by leonine Hello all, I bought an Irix 15mm f/2.4 a few days ago for use on the Pentax K-1. I also have the 28-45mm for the Pentax 645Z, but wanted a wider lens which was easier to handle than the Pentax 15-30 on the K-1. I also bought the following from Breakthrough Photography a few months ago for use with the MF lenses for 645Z:- (1) Step-Up Ring 67mm to 82mm (for use with 55mm 645 lens) (2) X4 Neutral Density filter - 100mm Square / 6-stop (3) X100 filter Holder - 82mm Aluminum Square Adapter Ring (for use with 28-45mm 645 lens) (4) X100 Holder I already had the old Singh-Ray 100mm square filters - GND, Tobacco/ Blue/ Gray Graduated etc from the film area. The Irix dia is 95mm. There is no 95mm adapter ring available from Breakthrough Photography; however, the same is available form Lee and maybe a few more local companies. My question is:- Will the Lee 95mm adapter ring (meant for the Lee filter Holder) allow the use of the Breakthrough Photography X100 filter holder for Pentax K-1? Regards, Leonine Irix makes their own 100mm filter holder. It’s very well made and you can order it on their website.

02-14-2020, 10:40 AM	#4
leonine Senior Member Join Date: Mar 2018 Posts: 149 Original Poster	Originally posted by TerryL Irix makes their own 100mm filter holder. It’s very well made and you can order it on their website. I just spent a tidy sum on the Breakthrough Photography filter holder system. I am hoping to optimize that system for the Irix.

02-14-2020, 12:38 PM	#5
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 39,156	Originally posted by leonine The Irix dia is 95mm. There is no 95mm adapter ring available from Breakthrough Photography Originally posted by leonine I just spent a tidy sum on the Breakthrough Photography filter holder system. I am hoping to optimize that system for the Irix. It is a shame that they don't make something to fit your lens and a pity you did not know this before you committed to their system. Steve

02-15-2020, 12:32 PM	#6
leonine Senior Member Join Date: Mar 2018 Posts: 149 Original Poster	Originally posted by stevebrot It is a shame that they don't make something to fit your lens and a pity you did not know this before you committed to their system. Steve Indeed it is. But i need to find a way out of it.

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