Polarizing filter allows you to cut out excess light, suppressing unwanted reflections, increasing color saturation and overall contrast of the photo. But this is a general rule. Usually, polarizers (polarizing filters) are spoken of in the context of landscape photography, but their use is also appropriate in subject и interior photography.
When shooting interior polaric effect especially clearly manifests itself on horizontal reflective surfaces: on the floor, tables, shelves, etc. If the interior has a lot of lacquered furniture, shiny parquet, transparent glass surfaces, then the polarik can significantly change the nature of the resulting photograph. It is not always appropriate: there is no universal rule for applying a polarizing filter when photographing real estate. But in some situations the polarik can be extremely useful.
Most common use. Due to the effect of polarization, you can remove unnecessary reflections from the floor and emphasize its texture. Moreover, this applies to both rooms with windows and without windows. Below you can see an example of a photo with different polarization effects.
Also, a polarizing filter will be very useful if you need to correctly transfer invoice pieces of furniture. This function will be useful when shooting for interior designers or furniture showrooms... Sometimes it can be critically important to remove unnecessary glare from the surface of a table or bedside table, but conventional photography will not give this effect.
I want to clarify that the possibilities of a polarizing filter are not limitless... Polarik works if light hits the surface at approximately 45 plus / minus degrees. You cannot remove your reflection in a mirror or transparent glass. The filter can help remove unwanted reflections in the bathroom from the glass surfaces of the shower stall, but each case is unique and should be used with caution.
Also note that the polarizing filter "eats" 1-2 stops of exposure. It doesn't matter for shooting interiors with a tripod, but it's worth remembering if you want to shoot everything with this filter.
About Canon RF-EF drop-in polarizer adapter
Like any filter, a polarizing filter needs to be fitted to your lens in some way. Wide-angle and super wide angle lenses often have a convex front element. This feature prevents easy installation of the filter in front of the lens. The mirrorless camera adapter solves this problem. Canon RF-EF drop-in polarizer with replaceable filter. Some time ago I bought myself such a filter and I am very pleased with it. I can now use a polarizing filter with absolutely any EF optics, regardless of the size and shape of the front lens.
The bottom line is that with this adapter, you install a polarizing filter between the camera and the lens, rather than winding it in front of the lens. The nuance is that for this you need a camera with a bayonet mount RFand a Canon EF mount lens. Now people buying cameras like Canon RP, R, R6, R5, as a rule, optics are purchased for them on the "native" RF bayonet. But in this way they deprive themselves of the possibility of using adapters such as this one. The advantage of the adapter is also that you can replace the polaric with an ND filter with any density. The filters are inserted into the adapter and can be changed.
Recommend for purchase inexpensive adapter with polar and ND filter for Canon full frame mirrorless cameras.
How to shoot interiors - tips from Olegasphoto.