----------------------------------- GunDALF 09 Mai 2023 19:01 ----------------------------------- Si aberatiile cromatice afecteaza rezolutia si transferul de contrast, uneori chiar mai mult decat obstructia centrala. Corect. Dispersia aceea a luminii scade contrastul. De aceea i-am recomandat (macar) ED. Si ca sa spunem totul, chiar si la cele mai bune lunete apocromate exista o deviere de la contrastul etalon al unui instrument ideal. PS: initiator, daca ai minime aptitudini practice, pentru terestru poti cumpara un obiectiv foto mai vechi de tip catadioptric (mirror lens, [url=https://www.amazon.com/Opteka-1000mm-Telephoto-Digital-Cameras/dp/B00SG504QQ]ceva de genul asta) si sa-l transformi intr-un super mini Mak. Ala l-ai putea monta si pe un trepied obisnuit. https://www.ebay.com/itm/204286540915?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D249332%26meid%3Ddeb5553bda3b4494ba955bc190a2daef%26pid%3D101195%26rk%3D4%26rkt%3D12%26sd%3D114704672544%26itm%3D204286540915%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplAMLv11WebTrimmedV3MskuWithLambda85KnnRecallV1V4V6ItemNrtInQueryAndCassiniVisualRankerAndBertRecallWithVMEV3%26brand%3DSoligor&_trksid=p2047675.c101195.m1851&amdata=cksum%3A204286540915deb5553bda3b4494ba955bc190a2daef%7Cenc%3AAQAIAAABUPqB0EgCndAssfMWNy0AT0GytGzF9%252By0G%252BlcW69DgBK3Qlz4BjwJQqPkN4K8I7qz9LY8U%252FWG89Cz8kpoCPe2W%252BwV%252FesQn1W1tlV%252F4u9Gi3R%252Fi2p%252B26bXe5wIgvwB9zB4Bm%252BMZT2qzDVEPWyLpo57EchHLKieqxa6WZAS7trzZDHap9KTgF%252FggMFw1gwuRWBapxEkj54smZqbfj%252F8Yrs8gE4wpUqo0ddMFruV0ACdArRSdmGzsFGjRsQuM2%252FEci7HCKr%252B%252FwoaZ1pcQkTeskKdY6FBWk76M5spO2MR7Peu4MT%252BK6zSb52Wh4LBOa9GAyelS1g6Nb1DwgLSyZx7mXWOD4UJIQDZW0pk1h9bnGQwpeYBwszxdxDEUrR%252FD8FylsF2Z4eCxump5F%252BWfupCv9Sg5auBGYEsu8uv%252FycnBay1%252BhcQJ0ZdXpHnEwFjtaqb%252Bgez9g%253D%253D%7Campid%3APL_CLK%7Cclp%3A2047675 https://www.ebay.com/itm/385364810646?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D249332%26meid%3Ddeb5553bda3b4494ba955bc190a2daef%26pid%3D101195%26rk%3D3%26rkt%3D12%26sd%3D114704672544%26itm%3D385364810646%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplAMLv11WebTrimmedV3MskuWithLambda85KnnRecallV1V4V6ItemNrtInQueryAndCassiniVisualRankerAndBertRecallWithVMEV3%26brand%3DSpiratone&_trksid=p2047675.c101195.m1851&amdata=cksum%3A385364810646deb5553bda3b4494ba955bc190a2daef%7Cenc%3AAQAIAAABUPqB0EgCndAssfMWNy0AT0GytGzF9%252By0G%252BlcW69DgBK3Qlz4BjwJQqPkN4K8I7qz9LY8U%252FWG89Cz8kpoCPe2W%252BwV%252FesQn1W1tlV%252F4u9Gi3R%252Fi2p%252B26bXe5wIgvwB9zB4Bm%252BMZT2qzDVEPWyLpo57EchJBzkVxVI9z0Cwz6n5cgwNlKDZBL%252FmmhzDLBq3isTholyJs1CzY6AMQkazkO7JVO%252FbBaJSA6xtFLCGNvi0fW6KeYO5Yc9At%252FPYv6zNthnTtxZZ8kman%252FRepWYLJJyWWDVzsGsG6Wi%252FnLBT4btjHOgfaLP%252FHHL%252BMo3mOcs42KuvfZ5sPNT0hq0Ux9sQgQtZD48GtLQrtW2Nn0xNDu%252BU9zSutZAP%252BC148Vg5iDJ2Lq7OvDU3Iwq2QNuf7C%252BNJQb9usR4%252B0Wtg9aHvLz6fsc9idcovwROPObLAUhP5htyDjaYig%253D%253D%7Campid%3APL_CLK%7Cclp%3A2047675 Sau un Mighty Mak! :mrgreen: https://astromagazin.ro/telescoape/3216-telescop-omegon-maksutov-mightymak-60700-cu-cautator-led.html