sd Quattro, dust spot, How to remove IR filter?

[SRT201]

My sd Quattro just arrived. This thing is comically chunky. What a beast!

The EVF is lovely and huge!

Anyhow, I started my test list and first on that list is looking for imager dust. I did a quick test at f11 which revealed a large spot and a very small one. The large one was just dust on the hot-mirror filter that was really removed with a Rocket Blower. The small spot though is clearly on the imager below.

I haven't found a nice guide on how to safely remove the hot-mirror. Anybody have any tips before I try to unclip this thing?

Obviously the first thing I'll do once the filter is removed is simply use the Rocket Blower. I do have imager cleaning swabs if necessary.

Thanks for any tips.

--
A government that has the power to correct any injustice and level any inequality has the power to do ANYTHING it wants.

 

[SRT201]

Found an article addressing this easy task.

You can remove the IR cut filter on Sigma Foveon cameras - it's fun!

You can remove the IR cut filter on Sigma Foveon cameras - it's fun!

www.diyphotography.net

 

[Roger]

Greetings SRT201

I that a Minolta SRT201???

My sd Quattro just arrived.

Great

This thing is comically chunky.

They are strangely interesting. You should see one with the Battery Pack/Grip see image.

What a beast!

By what standards? My Leica SL is just a big, and so is my Nikon Df.

The EVF is lovely and huge!

It is sweet

Anyhow, I started my test list and first on that list is looking for imager dust. I did a quick test at f11 which revealed a large spot and a very small one. The large one was just dust on the hot-mirror filter that was really removed with a Rocket Blower.

Be careful not to blast to hard

The small spot though is clearly on the imager below.

You can clone.

I haven't found a nice guide on how to safely remove the hot-mirror. Anybody have any tips before I try to unclip this thing?

Very very carefully. If you break the hot mirror it's hard to find another one. Very carefully you push up on the top tap the filter will then go up out of the bottom slot, then you slowly pull it from the bottom gently do not force anything. It it doesn't work put the filter back and try again.

Obviously the first thing I'll do once the filter is removed is simply use the Rocket Blower. I do have imager cleaning swabs if necessary.

Do not blow to hard and hold the camera upside down so the dust falls downward not into the camera.

Thanks for any tips.

Be careful with the mirror.

Roger J.




SDQ-H with Grip




Side View

 

[Ceistinne]

Greetings SRT201

I that a Minolta SRT201???

My sd Quattro just arrived.

Great

This thing is comically chunky.

They are strangely interesting. You should see one with the Battery Pack/Grip see image.

What a beast!

By what standards? My Leica SL is just a big, and so is my Nikon Df.

The EVF is lovely and huge!

It is sweet

Anyhow, I started my test list and first on that list is looking for imager dust. I did a quick test at f11 which revealed a large spot and a very small one. The large one was just dust on the hot-mirror filter that was really removed with a Rocket Blower.

Be careful not to blast to hard

The small spot though is clearly on the imager below.

You can clone.

I haven't found a nice guide on how to safely remove the hot-mirror. Anybody have any tips before I try to unclip this thing?

Very very carefully. If you break the hot mirror it's hard to find another one. Very carefully you push up on the top tap the filter will then go up out of the bottom slot, then you slowly pull it from the bottom gently do not force anything. It it doesn't work put the filter back and try again.

Obviously the first thing I'll do once the filter is removed is simply use the Rocket Blower. I do have imager cleaning swabs if necessary.

Do not blow to hard and hold the camera upside down so the dust falls downward not into the camera.

Thanks for any tips.

Be careful with the mirror.

Roger J.


SDQ-H with Grip


Side View

Roger,

You are correct about being careful with the filter but you are not correct about removing it. It's on the SD1 Merrill you push up on the top to unclip the bottom.

The sd Quattros are much easier to remove as follows:- As you look at the camera with the lens removed you'll see at the right side of the filter a lever, push that to the right to release the filter and then grip the tab at the top of the filter with a tweezers and lift out carefully. To put back in get it in place and press down, again carefully, until it clips into place under the lever at the right side. See page 153 and 154 of the sd Q manual. https://www.sigma-global.com/en/support/download/sdQuattro_Manual_en.pdf

S

 

[SRT201]

Greetings SRT201

I that a Minolta SRT201???

Of course! That was my first serious camera.

My sd Quattro just arrived.

Great

This thing is comically chunky.

They are strangely interesting. You should see one with the Battery Pack/Grip see image.

What a beast!

By what standards? My Leica SL is just a big, and so is my Nikon Df.

Compared to my Sony and Olympus stuff

I haven't found a nice guide on how to safely remove the hot-mirror. Anybody have any tips before I try to unclip this thing?

Very very carefully. If you break the hot mirror it's hard to find another one. Very carefully you push up on the top tap the filter will then go up out of the bottom slot, then you slowly pull it from the bottom gently do not force anything. It it doesn't work put the filter back and try again.

Obviously the first thing I'll do once the filter is removed is simply use the Rocket Blower. I do have imager cleaning swabs if necessary.

Do not blow to hard and hold the camera upside down so the dust falls downward not into the camera.

Thanks for any tips.

Be careful with the mirror.

Roger J.

Thanks for the info

SDQ-H with Grip


Side View

--
A government that has the power to correct any injustice and level any inequality has the power to do ANYTHING it wants.

 

[SRT201]

Thanks for the manual reference. I couldn't find it.

 

[SRT201]

Removing the hot-mirror is indeed easy. It is thin and fragile as mentioned though and so not to be handled without great care.

I had to replace and remove the hot-mirror about 4 times today trying to get the last dust specks blown off the imager and both sides of the hot-mirror. I wasn't amused.

 

[Scottelly]

Removing the hot-mirror is indeed easy. It is thin and fragile as mentioned though and so not to be handled without great care.

I had to replace and remove the hot-mirror about 4 times today trying to get the last dust specks blown off the imager and both sides of the hot-mirror. I wasn't amused.

 

[SRT201]

Removing the hot-mirror is indeed easy. It is thin and fragile as mentioned though and so not to be handled without great care.

I had to replace and remove the hot-mirror about 4 times today trying to get the last dust specks blown off the imager and both sides of the hot-mirror. I wasn't amused.

Yeah, the process sucks, and I now have many sensor spots in photos, because I avoid cleaning my sensor. I've become sort of oblivious to them, and yhat's really not a good thing. It's become so bad that I didn't notice a piece of debris, which somehow got stuck under the cover glass on my medium format sensor, and I shot thousands of photos with that camera over a year, never noticing the large sensor spot that was on every photo.

Unfortunately, the process requires that the camera to be facing upward while the hot-mirror is installed. It's the perfect position for catching dust coming into that big lens flange well. I wonder if I can buy a discounted clean-room during Amazon Prime Days.

Ouch, that sucks regarding your medium format. Hopefully it's covered under warranty since it's a factory defect that you can't clean off. A friend of mine recently discovered a similar issue on his Canon full frame that he had been shooting with all year.