Store your photographic materials safely by using Archival White Paper from Archival Methods as a form of interleaving paper or protective cover for your media. The paper is made from alpha cellulose with 25% cotton fiber content and is calcium carbonate buffered as well as both acid and lignin free for preventing degradation of your photographs. It has a basis weight of 120 gsm and passes the Photographic Activity Test (PAT) as indicated in ISO IT 18916. Additionally, it was made in the USA.

Alpha Cellulose and Cotton Fiber Base    Safely Store Photographic Materials    Passes Photographic Activity Test    Basis Weight: 120 gsm    Calcium Carbonate Buffered    Acid and Lignin Free    Made in the USA

Made from alpha cellulose wood pulp with 25% cotton fiber content to create a durable, white paper with a basis weight of 120 gsm.

Uses calcium carbonate as a buffer with 2-3% alkaline reserve, measured to a pH of 9 ±0.5 and being acid free.

This media passes the PAT (Photographic Activity Test) as indicated by ISO IT 18916, which is formerly ISO 14523 ANSI IT9.16.

Sulfur content is measured to less than 0.0008% reducible sulfur.

Lignin content is measured to TAPPI 236 cm-85 standards and has a Kappa number of less than five.

Related Questions and Answers

Q: 1. bought lens canon 17-85 when I am done with shot on AF lens is still out and I go to put cap on and it pushes lens in when I put cap on am I damaging lens to move it??

A: This sounds more like the zoom mechanism when you say it stays out. rather than the autofocus. Since the zoom is a manual adjustment, I can't see that this would cause a problem provided you don't slam it back. I usually return the zoom to its most compact position before putting on the lens cap.

Q: 2. Does it have IS? Want to find good lens for BMPCC

A: Unfortunately, the Canon EF 17-40mm f/4 USM is not image-stabilized.

Q: 3. Will I be able to use a filter on the lens ?

A: Yes, but I've only been able to use one at a time. More than that and I start to see the edge of the filter when shooting at 17mm.

Q: 4. Can you use this on a godox sl100D

A: No, the Godox SA-17 Bowens Mount to S30 Mount Adapter is not compatible with the Godox SL100D.

Q: 5. Hi, would this lens work on the Canon Rebel T3i?

A: Yes, it is 100% compatible.

Q: 6. Does this lens fit Canon 40D? Also, does this have Macro?

A: The Canon EF-S 17-85mm f/4-5.6 IS USM Lens is compatible with the Canon 40D, yes. Though, it is not a macro lens.

Q: 7. Is the focus ring on this lens mechanically connected to the inner workings or does the camera have to be turned on with the shutter button partially pressed to adjust focus manually?

A: There is a AF/MF switch on the lens. When it's on AF you have to press shutter half down to Auto Focus. When it's on manual, there's a ring right before the Zoom ring that you rotate to achieve focus.

Q: 8. Is this compatable with Canon 60D?

A: Yes, the Canon EF-S 17-55mm lens is compatible with the Canon 60D.

Q: 9. What is the most powerful (brightest) LED light (continuous, for video) that this mount is compatible with?

A: The Godox SA-17 Bowens Mount to S30 Mount Adapter BH #GOSA17 is an adapter and is not specified for a max wattage rating.

Q: 10. Will this work with q2n?

A: Yes