Sigma 500mm f/4.5 filters (1 Viewer)

rrdjserv

Rick Cox

• Jan 17, 2009

• #1

Jan. 16, 2009

I just received my lens today and have a question. The instructions say to keep a filter in. I really don't want to use the polariser for birds because of possible light loss, so I have the clear filter in. But I am concerned that sooner or later, dust or moisture will get into the lens. If this happens will I have to send it back to Sigma for cleaning or is this something I could clean?

Any info will be appreciated. --Rick

 

a.dancy

Registered User

• Jan 17, 2009

• #2

I have both Sigma 300.f2.8 and 500 f4.5 I have had them since the end of 2004. They have each been subjected to the elements and each filtre has been cleaned once and I don't think they even needed cleaning, IQ had not been affected.

 

rrdjserv

Rick Cox

• Jan 18, 2009

• #3

Thank you so much for your response. I appreciate it.

 

rezMole

Well-known member

• Jan 18, 2009

• #4

I've had mine for a year now (and it was secondhand) and I haven't had a problem. Occasionally I've had some condensation on the filter when returning from a cold day out, but it always clears.

I would say you should always keep a filter in there otherwise you have a bllody big hole where anything can get in - i wouldn't fancy trying to get some bird cronk out of there if some got in!

 

Duke Leto

Without habitat, there is no wildlife. It's that s

• Jan 26, 2009

• #5

slight off topic, are the filters a standard screw fitting? I don't have a filter for my lens which I bought used and would like one and a polariser for those summer wader shots.....

 

rrdjserv

Rick Cox

• Jan 26, 2009

• #6

Some filters screw onto the front of the lens. Mine has a filter holder toward the rear of the lens. The filter screws into the holder.

 

Duke Leto

Without habitat, there is no wildlife. It's that s

• Jan 26, 2009

• #7

I meant with my Sigma 500/4.5 and its filter holder

 

Last edited: Jan 26, 2009

rrdjserv

Rick Cox

• Jan 26, 2009

• #8

It takes a 46mm filter. It does not mention the threads.

According to the instructions: "Please check the filter dimensions before you purchase extra filters. Some of the 46mm filters have a very thick ring and impede the filter holder from being inserted into the filter slot on the lens assembly. The thickness of the ring over its screw must be less than or equal to 5mm. This lens assembly accepts only Sigma Polarizing (PL) filters. The polarizing filters of other brands may not be adaptable to your assembly"

Hope this helps.

 

rezMole

Well-known member

• Jan 26, 2009

• #9

You can use an ordinary filter as long as it isn't too deep, but the polarising filter is non-standard. Most polarisers are constructed so that the glass can be rotated when thay are mounted on the front of the lens, but the Sigma polariser isn't made like this. It is just like an ordinary filter - the filter holder itself rotates inside the lens barrel.

 

Duke Leto

Without habitat, there is no wildlife. It's that s

• Jan 26, 2009

• #10

thanks so a pro range filter with a thin body should be okay

just found a distinct lack of choice at 46mm, any one know if a definate fit?

 

Last edited: Jan 26, 2009