Re: B+W 77mm UV/IR Cut (486M) MRC Filter
Re: B+W 77mm UV/IR Cut (486M) MRC Filter
- Subject: Re: B+W 77mm UV/IR Cut (486M) MRC Filter
- From: Iliah Borg <email@hidden>
- Date: Sun, 26 May 2013 11:02:09 -0400
One needs an IR filter if a beam from IR remote control makes a purple spot on the shot, or if a black plastic or wool turns purplish.
Digital sensors have very low UV sensitivity.
On May 26, 2013, at 10:57 AM, John Castronovo wrote:
> I don't really know what's best to be honest. Some of the new LED units are looking pretty good while many continue to use HID and full spectrum fluorescents. For hot lights, Solux lamps are supposed to be very well filtered at both ends of the spectrum but you'd need a lot of them to light a large piece of art. Plastic sheeting used to filter U.V. is available cheaply in large rolls so it's easy to use it over any light source, but good IR filtration isn't so I use Schott glass IR filters behind the camera lens. I think LED and wide spectrum fluorescent are much better choices than quartz when it comes to IR, but as in the case with Solux which is internally filtered, each lamp is different so it's hard to generalize without comparing the manufacturer's data.
>
> -----Original Message----- From: Hal Hinderliter
> Sent: Sunday, May 26, 2013 10:25 AM
> To: John Castronovo
> Cc: Millers' Photography L.L.C. ; email@hidden
> Subject: Re: B+W 77mm UV/IR Cut (486M) MRC Filter
>
> OK John, I'll bite - which type of studio lighting emits the least IR? (LED?) But what about UV, isn't that more important to reduce at the light source? And if so, what type of lights produce the least UV?
>
> Hal
>
> On May 26, 2013, at 2:00 AM, John Castronovo <email@hidden> wrote:
>
>> Does it help? The right place for filtering u.v. is at the light source. Once the artwork is fluorescing from u.v. light you can't filter the problem out at the camera. More IR filtration at the camera can help with some art, especially if you're using hot lights on a subject having colorants prone to metameric failure but it's still better to use lights that emit less IR in the first place.
>>
>> -----Original Message----- From: Millers' Photography L.L.C.
>> Sent: Sunday, May 26, 2013 12:55 AM
>> To: email@hidden List
>> Subject: B+W 77mm UV/IR Cut (486M) MRC Filter
>>
>> I must thank someone on this list that suggested purchasing the B+W 77mm UV/IR Cut (486M) MRC Filter for issues I had with reproducing a
>> particular piece of original art. It was around June 15, 2012. I purchased a B+W 67mm UV/IR Cut (486M) MRC Filter as well. These filters are
>> always on the shooting lens.
>>
>> I don't remember who it was. I have been asked who it was. If you are out there, please respond.
>>
>> Warm Regards,
>>
>> David
>>
>> David B Miller, Pharm. D.
>> member
>> Millers' Photography L.L.C.
>> dba Spinnaker Photo Imaging Center
>> Bellingham, WA
>> www.spinnakerphotoimagingcenter.com
>> 360 739 2826
>>
>>
>>
>>
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Best regards,
Iliah Borg
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