Guys...thanks for the info. From what I seen and read the Hoya HMC that I
purchased should be fine. I have only experienced vignetting with a
particular filter on my Minolta Di-7. Vignetting was my major
concern...other than that...I seek to provide protection for my lenses
against scratches.
- Ali
----- Original Message -----
From: "Matt Boland" <mattb@xxxxxxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Friday, October 29, 2004 5:49 PM
Subject: [OM] Re: Filters
> Hoya have single coated, multi-coated (HMC), and super multi-coated
> (S-HMC).
>
> They also have Ultra, which is HMC coatings on the low profile filters.
>
> The S-HMC transmits up to 99.7% of light.
> HMC transmits 98-99% of the light.
> Single coated transmits less.
>
> I use HMC (UV0) and these seem very good compared to another brand that
> I have (M*rumi - but to be fair I might have one of their cheapies). The
> reflections of white light off the HMC are a dull green, a good
> indication that most of the light is getting through. You can hold them
> at certain angles and the glass will disappear (not really, mind you,
> just an illusion), a good indication that they are optically OK. That
> other brand distorts light coming through it when compared with the
> Hoya. Personally, I think the HMC are the best value.
>
> To answer you questions:
> > Is there really a difference in filter quality and type?
> Do this:
> 1/ look through a good quality filter (regardless of which geographic
> location it was manufactured)
> 2/ Have a look through a chunk of quartz
> 3/ Note the difference
> Some filters are good quality, some are like quartz.
>
>
> > What type of filter do you suggest for a wide angle lens/wide angle
> > zoom lens?
> Get the best one you can afford.
>
> > What brand filter do you prefer. Typically I use Hoya...but I have
> > heard that Hoya (esp. Hoya made in the Phillipines) are junk.
> I think Hoya are good. I have heard they also make the Lions share of
> spectacle glass, how true this is, or in what geographic locations it's
> true, I don't know.
>
> > Does filter coating affect picture quality?
> Yes. Look at things like your budget, the lens you want to use it on,
> lenses you want to use it on in the future, and find a point on the
> price/performance curve that suits you. If you set up your camera on a
> tripod and use MLU, etc. then it doesn't take long to unscrew any
> filter, thereby giving an even better quality picture...
>
>
> Check out http://www.thkphoto.com/
>
>
>
> Ali Shah wrote:
>> I had a quick question on "standard" filters vs these newer ULTRA THIN
>> filters. Ultra thin filters decrease vignetting, which occur with wide
>> angle
>> lenses. Is there really a difference in filter quality and type? What
>> type
>> of filter do you suggest for a wide angle lens/wide angle zoom lens? what
>> brand filter do you prefer. Typically I use Hoya...but I have heard that
>> Hoya (esp. Hoya made in the Phillipines) are junk. Does filter coating
>> affect picture quality?
>>
>> Reason I ask this question...is that I obtained a 19 - 35 Vivitar lens
>> and
>> ordered a 77mm HOYA HMC filter...which is "standard" thickness.
>>
>> Thanks.
>>
>> - Ali
>>
>>
>> ==============================================
>> List usage info: http://www.zuikoholic.com
>> List nannies: olympusadmin@xxxxxxxxxx
>> ==============================================
>>
>
>
> --
> Matt Boland (BEng) Phone : 61 7 5594 9824
> R&D Engineer Mobile : 61 4 0835 1421
> Odyx Corporation Pty Ltd email : mattb@xxxxxxxxxxx
>
>
> ==============================================
> List usage info: http://www.zuikoholic.com
> List nannies: olympusadmin@xxxxxxxxxx
> ==============================================
==============================================
List usage info: http://www.zuikoholic.com
List nannies: olympusadmin@xxxxxxxxxx
==============================================
|