I don't think it's at all true to say there are almost no gaps in the L-mount lens line-up.
There will always be a gap. A Zeiss manager told me around 15 years ago, that 90% of the lenses sold in the photo industry are in the focal range of 28mm and 85mm. Only 10% aare sold outside of this range. In the analogue time, these 28-85mm were covered mostly by FFL and at that time of the conversation this changed totally to zooms.
My guess is that nowadays these numbers changed slightly. I assume that the most bought focal ranges are today between 24-75mm, because of all the zooms out there within that range. But the 90% rule probably still applies.
As a consequence, only few photographers are buying focal ranges above 85mm. Each brand will therefore wait to release these "exotic" lenses for the time when everything else is well covered or if there is an even like Olympics on the way for which you need specific focal ranges in case you have customers who do sport photography. The development of an exotic lens costs the same as a standard lens, but you sell less of them. To increase profits, especially while launching a new lens mount, you need to prioritize.
But that does not mean that the rest is not coming. Sigma, Leica and Panasonic released in 2023 I think 14 new lenses and already 6 new lenses until February 2024. Let's assume that they will target again 14 new lesens for 2024, there would be still 8 new lenses coming in 2024 only from these 3 companies. Let alone Samyang and others.
28mm, 40mm, 135mm and 200mm primes
28mm I agree. There are Leica alternatives, but these are to expensive for the normal L-Mount customer. The alliance missed so far this opportunity and 28mm fans will hesitate to enter the L-Mount system just because of the lacking 28mm lens choice
40mm is a kind of special FL in between 35mm and 50mm, which are well covered in L-Mount. There is the 45/2.8 and the Sigma 40/1.4 HSM Art in L-Mount. That one is very big and heavy (1.2kg). According to reviews an outstanding optical performer. But I could imagine that Sigma will update this lens in a DG DN version, which would make it smaller and lighter
Same story for the 135mm. Not a mainstream lens. Available in L-Mount. 135/1.8 HSM Art. Big and heavy (1.1kg). I think that one is even more likely to get a rebirth as a DG DN lens because of the benefits for wedding photography with that lens.
200mm prime is difficult to judge. Many tele zooms cover this range with a very good image quality. If someone launches this as a 200mm, this will be probably a beast to be able to outperform these tele zooms. I do not know how many people would buy a big, heavy and expensive 200mm over an excellent tele zoom, which gives more flexibility.
But no matter whether my assumptions are right or wrong, if we get each year 14 new lenses for L-Mount, I am sure that every wish will be fullfilled, no matter whether it is exotic or not. We have now such a huge base of lenses, that I am really confident with any kind of missing lenses.
Compact lenses - there isn't a single one I would class as compact
Cheaper lenses to bring in new people (hopefully on the way from Samyang)
A super-zoom that starts at 24mm
f/4 zooms (24-70mm, 70-200mm...) from Sigma which would be much cheaper than Panasonic versions
I agree.
As for cheaper. entry-level bodies, I think the fP is the only one and it's cheaper than a lot of APS-C models for other mounts.
That is an interesting observation. Unfortunately, the Fp is expensive in Germany. But I think the Fp could be a great brainstorming model to talk about what a future body should have. I will open an extra thread for this. I have many ideas
I agree that the 28-200mm is over-priced, but then I regard almost all Panasonic's S lenses as over-priced compared to the competition, so it's not a surprise.
I could imagine that all 3 alliance founders segment the market to price their products. Leica at the top end, Panasonic below that with a focus on videography, Sigma as the allrounder with focus on photography. Thanks to the distinction between Art and non-Art lenses Sigma is able to offer products in almost every price category and with the invenstion of the i-series even in the way how a lens should look and feel while using it.
But Sigma will IMHO no offer anymore everything for the cheapest price. They do not have to anymore. For this there are other options available nowadays with third party lens makers.
I find all brands (also Nikon, Sony, Canon etc.) overpriced compared to 10-20 years ago. Lens design has become more easy thanks to computer power and production quality control, its nowadays cheaper since many things are now corrected in FW. instead of a complicated lens design etc. pp.
But this is the name of the game, if less people buy cameras. You need to increase the margin to make enough profit with less sales than before.