docsmiles17 wrote: Fred Miranda wrote: Bobu wrote: Fred Miranda wrote: docsmiles17 wrote: Bobu wrote:
Here you can see the problem:
The Kase filter is on the left, the Haida on the right. The small lower nose is too thick for the slit on the lens. The Haida doesn't have this nose.
Sadly the Haida is 0.5mm thick, otherwise it would be perfect.
Received filter today
I got mine to fit, but took some time to figure out the proper angle. Initially I was trying the 45 degree angle per instructions with fingers and it wouldn't go in and thought there was no way this filter would fit the lens as it feels like your pushing something against a cement wall. 45 degree is the wrong angle. It requires a much smaller angle than that to insert properly.
I aligned the filter horizontal to the slot and used the rubber end of mechanical pencil to "hold" the filter and find the right angle. This angle is when the nose is resting against the slot and other end (Kase filter info on) is just above the silver mounting ring (roughly ½ of the 45 as instructed). It doesnt really take any force or effort at all to slide in. Its all about the angle and not trying to muscle it in. Be patient and work the angle versus using more force. I can not hold the filter with my fingers to get the right angle as that angle is so close to mount ring (concerns me with actual field use).
It doesnt feel like it will go in and then, bam, it will slide right in quite easily but only once you have the right angle. I have been successful with each re-insertion (3X before writing this) and each time it becomes easier to find the right angle. I took some pics with filter fully in slot so you can see the insertion angle from different perspectives.
I can not stress enough how important the angle is versus the instinct to "muscle it in". You can not force this filter in. Not only will you fail at inserting it, you will risk breaking it. Once you have the right angle, it requires very little pressure for the filter to slide in.
I will field test it asap and report back.
I can't get the Kase rear filter to fit into my lens' rear slot. No matter the angle. Very bad design!
I'm in contact with the CEO of Kase Germany. He is currently discussing the topic with the Headquarter in China.
I've also contacted Sigma Germany. This is their answer: "Informationen bezüglich der Kompatibilität dieser Filter liegen uns keine vor. Objektivseitig wüssten wir keine Möglichkeit, servicetechnisch etwas an der Halterung zu verändern." They see no possiblity to modify the lens slot in service for a better fit of the filter.
It looks like Kase rushed this filter to market.
The Sigma's rear slot thickness is ~0.3mm which is the same thickness of the Kase glass (Measured 0.3mm with a micrometer). However, there must be different tolerance from different batch of the Sigma lens. It does not fit my lens (US model) after trying to insert it at all possible angles.
Even if it fits in some lenses from different batches, it would be very inconvenient to mount and unmount it. I would not want to bring it to the field when shooting in adverse conditions and therefore I do not recommend it.
The Haida glass is even thicker at 0.5mm which influences field curvature in a very negative way. On top of that, it does not fit 100% parallel into the slot since there is no lower tip to lock it down. (It could tilt when carrying the lens)
I am waiting for the Aurora magnetic version and I hope it works without any degradation of IQ (higher vignetting from the new magnetic frame for example)
We already know their glass is ~0.3mm so field curvature interference should be minimal.
I wonder if the aurora magnetic version will attract more dust to the sensor.
So far we are 1 for 3 with fitting the Kase filter of those who have posted. Thats not good. I am getting very quick (couple secs) to insert each time now and can use my fingers to do so. I presume its about the same amount of time to install a front filter system, likely faster. I started a short video and will post asap on installing the Kase filter as I initially thought the filter would not fit my lens and was ready to give up but then it slipped into place. Lucky me?!1? My hope is that it will help others who (like me) were frustrated upon initial insertion and get it to fit.
Any rear filter system where the lens needs to be removed and thus exposing the sensor (no matter how short) would cause hesitation to be used in adverse conditions. This is a legitimate concern as I dont like even changing lenses in adverse conditions. The other option is to have rather large 150mm front filters that typically require a bigger bag to carry and any vignetting that likely will result. I guess it comes down to personal preference at this point until a more promising solution emerges.
I’ve been following along reading this thread with interest as an early pre-order Sigma 14-24 owner. I purchased the 150mm NiSi front filter system for this lens As soon as it was out and use it with a 3-stop ND, 10-stop ND, CPL, and combo CPL + 6-stop ND filters. I tried using the Lee gel filters on the rear lens holder but decided it was not for me.
I get the complaint that using the 150mm filter system requires a larger bag, it is heavier than the rear filters and takes more up room in the bag. But to be honest I just don’t understand the reluctance to use the front filters given the need to remove the lens from the camera allowing more dust and worse into the camera’s sensor. And there is the real limiting factor of not being able to dial-in just the right amount of polarization effect like you can with the 150mm front filters. To me, anyone really looking to get the optimal results of filtering this outstanding lens is short changing the results by not using a higher quality 150mm front filter system. Just my 2 cents😁
Jan 08, 2020 at 02:51 PM
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