Filtes What is the difference between an HMC filter and one that is not HMC?
151670
Hoya Standard filters have one layer of anti-reflectant coating to each surface of the glass to suppress reflection and increase light transmission. HMC (Hoya Multi-Coated) have 3 layers of anti-reflectant coatings on each surface to reduce average reflection down to 3.0% or less. Hoya S-HMC (Super HMC) also have 6 layers of anti-reflectant coatings. Finally, the Super HMC PRO 1 is made of thinner glass (only 1mm thick), also with 6 layers of anti-reflectant coatings bonded to each surface of the glass.
2011472
Buyer beware as there are a TWO different filters being sold under the SAME basic HC-504 nomenclature. The original/good version is 1.25" thick, whereas many of the more recent offerings are only 0.75" thick, therefore with MUCH less moisture-delivering efficiency/life, yet at the same price. Worse yet, often the images shown in Amazon are dimensionally proportional to the original/good ones but what they really ship is the inferior version - I know because I just returned six filters to Amazon but got stuck with shipping charges and wasted time. Someone else suggested another source (filters-now dot com) and I'm sending them an inquiry based on the above. (PS- some of the filter offerings tout a blue "dust catching" wrap that IMHO is pure marketing hype.)
1394988
The filter is specifically designed ONLY for the filters that come with the helmet. HEPA is not an option unless you alter the unit. No this not HEPA, in fact I had to try and improve the helmet, if you need that level of protection get a non electric form fitting filter mask MSA or other from wood craft look at the cat. These helmets give you the minimum requirements go figure out the price as to why they charge so much for something that is inferior to other non powered ones.
1312346
Yes, it is. The label says "5 micron Nominal Filtration". It is a MATRIKX+CTO /2 32-425-125-975http://www.matrikxfilters.com/cto2.html
2170902
Yes, this is a 1900, MRV12 filter with a pressure drop of .21 and captures 90% of all particles. I called Filtrete and asked. Too bad Amazon couldn't figure that out!Also, the "Healthy Living" line is made only for Amazon, that's why you won't see it on Filtrete's website. It's just their normal filters with seemingly less information and different packaging.
1384343
HHC is the model not sure about the number.I have purchased the hhc 2pack here on amazon and it is the exact filter. Here is the link
827568
According to the user manual, you can use either as they are shaped the same & will install the same way. You just don't get the benefit of the hepa super filtering.
448247
Unfortunately one 1 filter. It makes a huge difference as it is pleated and much wider than the other ones.
808368
It says that the exhaust filter is a hepa filter. There are also two types of bags that you can get - one is a little more expensive and more like cloth than paper and I think this also helps retain tiny particles.
1568922
The black filters are better per many recommendations. If you have any concerns about contaminants get the extra filter for arsenic and such. It slows the filtration but pulls out heavy metals.
1597689
Yes it is Multicoated. You will see on the ring that is says "Hoya HMC". The HMC is Hoya's designatin for "Hoya Multi Coated". This is a great filter and find myself using it more and more all the time for long exposure shots.
291020
fqsvf goes into my fqslf filter and it works. not sure about what the contaminates difference is
629355
Phil - HCC20-28 is the model number of the filter chassis and HCF20-16 the model number of the filter. Hope this helps.Alan
925152
I have one of each and they are both the same except for the color. Both of them came with a filter.
1593350
No, both go through the same hole. There is a handle that you turn on the unit that switches it to filtered/unfiltered.
199842
These are not true HEPA filters; they are HEPA-type filters. True HEPA filters are available at http://www.amazon.com/Holmes-HAPF30D-Replacement-HEPA-Filter/dp/B0045LQCIO.
541040
From what I gathered, the filters are the same. The PF48F is a "fleet pack" of a dozen PF48s.