yukosteel
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Yes the pictures are great, thank you. It's impressive to see that lens is detached in such a clean way without any visible damage to helicoid. Looks like the radial rotation stress only impacted inner pair of brass helicoid guiders. They are made of thick brass plate, but are not indestructible - it's a trade of in a favor of having this lens in impressively compact size.
Good news is that this damage is repairable and lens can be returned to perfect factory-like functional condition. It's not hard to DIY craft brass guider replacements, thankfully their geometry is relatively simple.
On the other side - its useful to discover that CV 28mm F2 requires extra attention when dealing with hood mount area . Some third party lens hoods have very strong springs may require excessive effort to be detached. If hood is stuck, do not rotate it with force - set aperture ring to F16 and focus lens to infinity. Then grab the hood and press it toward lens front first, only then dismount in CCW direction, it should rotate easy that way.
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